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The cattle production system focuses on maintaining an animal-based food supply with a lower number of cattle. However, the fecundity of dairy cows has declined worldwide. The reproductive tract microbiome is one of the important factors which can influence bovine fecundity. Therefore, reproductive tract microbiomes have been explored during the estrus cycle, artificial insemination, gestation, and postpartum to establish a link between the micro-communities and reproductive performance. These investigations suggested that microbial dysbiosis in the reproductive tract may be associated with declined fertility. However, there is a scarcity of comprehensive investigations to understand microbial diversity, abundance, shift, and host-microbiome interplay for bovine infertility cases such as repeat breeding syndrome (RBS). This review summarizes the occurrence and persistence of microbial taxa to gain a better understanding of reproductive performance and its implications. Further, we also discuss the possibilities of microbiome manipulation strategies to enhance bovine fecundity. [ABSTRACT FROM AUTHOR]

Although monotremes diverged from the therian mammal lineage approximately 187 million years ago, they retain various plesiomorphic and/or reptilian‐like anatomical and physiological characteristics. This study examined the morphology of juvenile and adult female reproductive tracts across various stages of the presumptive oestrous cycle, collected opportunistically from cadaver specimens submitted to wildlife hospitals during the breeding season. In adult females, ovaries had a convoluted cortex with follicles protruding from the ovarian surface. While protruding antral follicles were absent from the ovaries of juvenile echidnas, histological analysis identified early developing primordial and primary follicles embedded into the ovarian cortex. The infundibulum epithelial cells of the oviducts were secretory during the follicular phase but not at other stages, the ampulla region was secretory at all stages and is likely responsible for the mucoid layer deposited around the zona pellucida, and the isthmus region of the oviduct appeared to be responsible for initial deposition of the shell coat, as in marsupials. Female echidnas have two separate uteri, which never merge and enter separately into the urogenital sinus (UGS). This study confirmed that both uteri are functional and increase in glandular activity during the luteal phase. In the juvenile uteri, the endometrium was immature with minimal, small uterine glands. A muscular cervical region at the caudal extremity of each uterus, just before the cranial region of the UGS was defined by the absence of glandular tissue in all female echidnas, including the juveniles. There was no evidence of a definitive vaginal region. A clitoris was also detected that possessed a less developed but similar structural (homologous) anatomy to the male penis; urethral ducts while present did not appear to be patent. [ABSTRACT FROM AUTHOR]

To locate and fertilize the egg, sperm probe the varying microenvironment prevailing at different stages during their journey across the female genital tract. To this end, they are equipped with a unique repertoire of mostly sperm-specific proteins. In particular, the flagellar Ca2+ channel CatSper has come into focus as a polymodal sensor used by human sperm to register ligands released into the female genital tract. Here, we provide the first comprehensive study on the pharmacology of the sperm-specific human Slo3 channel, shedding light on its modulation by reproductive fluids and their constituents. Weshow that seminal fluid and contained prostaglandins and Zn2+ do not affect the channel, whereas human Slo3 is inhibited in a non-genomic fashion by diverse steroids as well as by albumin, which are released into the oviduct along with the egg. This indicates that not only CatSper but also Slo3 harbours promiscuous ligandbinding sites that can accommodate structurally diverse molecules, suggesting that Slo3 is involved in chemosensory signalling in human sperm. [ABSTRACT FROM AUTHOR]

Bacterial endometritis is among the most common causes of subfertility in mares. It has a major economic impact on the equine breeding industry. The sensitivity of detecting uterine microbes using culture-based methods, irrespective of the sample collection method, double-guarded endometrial swab, endometrial biopsy, or uterine low-volume lavage (LVL), is low. Therefore, equine bacterial endometritis often goes undiagnosed. Sixteen individual mares were enrolled, and an endometrial sample was obtained using each method from all mares. After trimming, quality control and decontamination, 3824 amplicon sequence variants were detected in the dataset. We found using 16S rRNA sequencing that the equine uterus harbors a distinct resident microbiome during estrus. All three sampling methods used yielded similar results in composition as well as relative abundance at phyla (Proteobacteria, Firmicutes, and Bacteroidota) and genus (Klebsiella, Mycoplasma, and Aeromonas) levels. A significant difference was found in alpha diversity (Chao1) between LVL and endometrial biopsy, suggesting that LVL is superior at detecting the low-abundant (rare) taxa. These new data could pave the way for innovative treatment methods for endometrial disease and subfertility in mares. This, in turn, could lead to more judicious antimicrobial use in the equine breeding industry.

Extracellular vesicles (EVs) are abundant in reproductive tract fluids and serve as important mediators of paracrine communication, influencing the function of gametes. Sperm undergo development in the male reproductive tract and exert their function within the female reproductive tract, engaging in interactions with various types of EVs present throughout the reproductive system. Previous studies have demonstrated that both male and female reproductive tract EVs can impact sperm function by transferring regulatory cargoes to them. Nevertheless, inconsistencies of previous research regarding the effects of EVs on sperm function, coupled with a lack of investigation into the influence of female reproductive tract EVs on sperm fertilization, have left the true role and underlying mechanisms of reproductive tract EVs on sperm function largely unexplored. Given that pigs represent significant economic livestock and serve as an ideal biomedical model for human diseases, this review aims to provide a comprehensive summary of the current knowledge regarding reproductive tract EVs and their influence on boar sperm function, while highlighting their potential roles. We anticipate that this review will facilitate future research on reproductive tract EVs and their impact on sperm function, contributing to improved animal reproductive efficiency and advancements in the treatment of male infertility. • EVs are widely existed in the pig reproductive tract. • The reproductive tract EVs in pig could interact with sperm, and influence the sperm fertility. • The miRNAs are important messengers involved in the EVs and sperm interaction. [ABSTRACT FROM AUTHOR]

Background: Assisted reproductive technology (ART) is the most effective method to treat infertility and the pathogenesis of implantation failure after in vitro fertilization-embryo transfer (IVF-ET) is a challenging filed in infertility. Microbes in the female reproductive tract are considered to be associated with gynecological and obstetric diseases. However, its effects on embryo implantation failure are unsured. Purpose: This study aimed to investigate reproductive tract dysbiosis, identify different bacteria in reproductive tract as potential biomarkers of embryo implantation failure and demonstrate the pathogenesis through metabolites analysis. Methods: We compared the data from 16S rRNA gene and metagenome in reproductive tracts through QIIME2 and HUMAnN2 by the times of embryo implantation failure on 239 infertile patients and 17 healthy women. Results: Our study revealed a strong positive correlation between Lactobacillus abundance and embryo implantation success (IS) after IVF-ET. The microbial community composition and structure in reproductive tract showed substantially difference between the embryo implantation failure (IF) and healthy control. Moreover, we established a diagnostic model through receiver operating characteristic (ROC) with 0.913 area under curve (AUC) in IS and multiple implantation failures (MIF), verified its effectiveness with an AUC = 0.784 demonstrating microbial community alterations could efficiently discriminate MIF patients. Metagenome functional analyses of vaginal samples from another independent infertile patients after IVF-ET revealed the L-lysine synthesis pathway enriched in IF patients, along with ascended vaginal pH and decreased Lactobacillus abundance. Conclusions: This study clarifies several independent relationships of bacteria in vagina and endometrial fluid on embryo implantation failure and undoubtedly broadens the understanding about female reproductive health. [ABSTRACT FROM AUTHOR]

Microbiota in the reproductive tract of cattle play a vital role in maintaining normal reproduction. However, the information on microbiota in different parts of reproductive tracts with different genetic background is few. The aim of the present study was to describe and compare the microbiota in vagina, cervix and uterus of Yanbian cattle and Yanhuang cattle. The results showed that microbial diversity increases from the vagina to the uterus. The top three bacterial phyla in bovine reproductive tract were Proteobacteria, Firmicutes and Bacteroidetes, accounting for more than 85%. From the vagina to the uterus, the relative abundance of Proteobacteria gradually decreased, while that of Firmicutes gradually increased. Phylum-level Firmicutes and genuslevel UCG_010 were significantly enriched in the uterus of Yanbian cattle and Yanhuang cattle. Comparing the same parts of the two breeds, it was found that there was no significant difference in alpha diversity, but significant differences in beta diversity. In addition, microbiota with significant differences in the relative abundance of the reproductive tract were found. These findings lay a foundation for a comprehensive understanding of the structure of the genital tract microbiota of cows and its regulatory mechanisms. [ABSTRACT FROM AUTHOR]

Simple Summary: The goal of this research was to determine if the neurotrophin β-Nerve growth factor is present in the reproductive tract of stallions. This protein has been identified in the semen of camelids and functions to stimulate the release of a hormone from the pituitary of female camelids that is ultimately responsible for the induction of ovulation. β-Nerve growth factor (β-NGF) is a protein produced in the reproductive tract of camelids (camels, llamas, and alpacas) that has been identified as the ovulation inducing factor in seminal plasma. β-NGF from seminal plasma deposited into the reproductive tract of the female camelid acts systemically to stimulate the secretion of luteinizing hormone (LH) from the anterior pituitary, which in turn induces follicle maturation and ovulation. The objectives of the present study were to determine if β-NGF is present in the reproductive tract of the stallion and identify the specific site(s) of production. The hypotheses were that β-NGF would be present in the stallion reproductive tract and would primarily be localized in Sertoli cells of the testes and the prostate gland. Immunohistochemistry on paraffin-embedded paraformaldehyde-fixed tissues was performed using a rabbit polyclonal anti-β-NGF antibody on a total of six male equine reproductive tracts, including a one-day old colt, a one-year-old colt, and four adult stallion tracts. Strong immunostaining was observed in the efferent ducts of the testes and the epithelial cells of the prostate, seminal vesicles, bulbourethral glands, and ampullae. Weaker β-NGF staining was noted in Leydig cells, Sertoli cells, and spermatogonia within the testes and in epithelial cells of the epididymis. In conclusion, immunohistochemistry revealed that β-NGF is present in the stallion reproductive tract, and the protein is primarily present in the efferent ducts of the testes and in all accessory sex glands. [ABSTRACT FROM AUTHOR]

Chlamydiosis is one of the main causes of the progressive decline of koala populations in eastern Australia. While histologic, immunologic, and molecular studies have provided insights into the basic function of the koala immune system, the in situ immune cell signatures during chlamydial infection of the reproductive tract in koalas have not been investigated. Thirty-two female koalas and 47 males presented to wildlife hospitals with clinical signs suggestive of Chlamydia infection were euthanized with the entire reproductive tract collected for histology; immunohistochemistry (IHC) for T-cell (CD3ε, CD4, and CD8α), B-cell (CD79b), and human leukocyte antigen (HLA)-DR markers; and quantitative real-time polymerase chain reaction (rtPCR) for Chlamydia pecorum. T-cells, B-cells, and HLA-DR-positive cells were observed in both the lower and upper reproductive tracts of male and female koalas with a statistically significant associations between the degree of the inflammatory reaction; the number of CD3, CD4, CD79b, and HLA-DR positive cells; and the PCR load. CD4-positive cells were negatively associated with the severity of the gross lesions. The distribution of immune cells was also variable according to the location within the genital tract in both male and female koalas. These preliminary results represent a step forward towards further exploring mechanisms behind chlamydial infection immunopathogenesis, thus providing valuable information about the immune response and infectious diseases in free-ranging koalas. [ABSTRACT FROM AUTHOR]

Simple Summary: Understanding the genetic makeup of microorganisms provides information on their evolutionary relationship with other similar organisms. It also sheds light on their ability to cause disease in susceptible individuals and to resist the hosts' defense mechanisms, including the effects of antimicrobial therapy. In this study, we performed complete genome sequencing and characterization of bacteria called Arcanobacterium hippocoleae, which were isolated from the reproductive tract of infected mares. These bacteria displayed small and large phenotypes when grown on artificial media. The whole genome sequences between the large phenotypes were closely related, while the small and large types were distant from each other in terms of sequence size and identity. Putative genetic elements that might be associated with disease conditions were identified in both bacterial phenotypes. Several genes that express hypothetical proteins with unknown functions were also detected. This study provides the complete genetic structure and analysis of different phenotypes of Arcanobacterium hippocoleae and will serve as a benchmark for future studies to identify the potential function and role of the bacterial proteins in the ability of the bacterium to produce reproductive tract diseases in mares. Arcanobacterium hippocoleae is a Gram-positive fastidious bacterium and is occasionally isolated from the reproductive tract of apparently healthy mares (Equus caballus) or from mares with reproductive tract abnormalities. Apart from a few 16S rRNA gene-based GenBank sequences and one recent report on complete genome assembly, detailed genomic sequence and clinical experimental data are not available on the bacterium. Recently, we observed an unusual increase in the detection of the organism from samples associated with mare reproductive failures in Atlantic Canada. Two colony morphotypes (i.e., small, and large) were detected in culture media, which were identified as A. hippocoleae by MALDI-TOF mass spectrometry and 16S rRNA gene sequencing. Here, we report the whole genome sequencing and characterization of the morphotype variants. The genome length of the large phenotypes was between 2.42 and 2.43, and the small phenotype was 1.99 Mbs. The orthologous nucleotide identity between the large colony phenotypes was ~99%, and the large and small colony phenotypes was between 77.86 and 78.52%, which may warrant the classification of the two morphotypes into different species. Phylogenetic analysis based on 16S rRNA genes or concatenated housekeeping genes grouped the small and large colony variants into two different genotypic clusters. The UvrA protein, which is part of the nucleotide excision repair (NER) system, and 3-isopropoylmalate dehydratase small subunit protein expressed by the leuD gene were identified as potential virulence factors in the large and small colony morphotypes, respectively. However, detailed functional studies will be required to determine the exact roles of these and other identified hypothetical proteins in the cellular metabolism and potential pathogenicity of A. hippocoleae in mares. [ABSTRACT FROM AUTHOR]

ABSTRACT: The microbiomes of the reproductive tract play a crucial role in the egg production and quality and reproductive health of laying hens. Speckled eggs are characterized by shells with brown spots of varying sizes and commonly produced by brown-shelled laying hens. Speckles reduce the economic value of eggs. However, the relationship between oviduct and cloacal microbiomes and the presence of speckled eggs in laying hens remains unclear. In this study, we collected samples from the reproductive tracts (uterus, vagina, and cloaca) of hens laying speckled eggs and those laying normal eggs and compared their microbial structures and relative abundances through 16S rRNA sequencing. We found that the microbial community structure in the reproductive tracts of the hens laying speckled eggs was similar to that in the reproductive tracts of the hens laying normal eggs; however, the relative abundances of Clostridium in the uterus and Turicibacter and Gallibacterium in the vagina of the hens from the speckled group (7.27%, 6.83% and 0.10%, respectively) were significantly higher than those in the normal group (2.00%, 0% and 0%, respectively [P < 0.05]). Additionally, 8, 24, and 11 bacterial taxa in the uterus, vagina, and cloaca were different between the groups of hens laying speckled and normal eggs. At the same time, Clostridium in the uterus may be associated with eggshell speckles. However, further investigations are necessary to understand the functions of these microbiota in the reproductive tracts of laying hens. This study provides novel insights into methods for reducing the occurrence of speckled eggs in laying hens.

The cattle production system focuses on maintaining an animal-based food supply with a lower number of cattle. However, the fecundity of dairy cows has declined worldwide. The reproductive tract microbiome is one of the important factors which can influence bovine fecundity. Therefore, reproductive tract microbiomes have been explored during the estrus cycle, artificial insemination, gestation, and postpartum to establish a link between the micro-communities and reproductive performance. These investigations suggested that microbial dysbiosis in the reproductive tract may be associated with declined fertility. However, there is a scarcity of comprehensive investigations to understand microbial diversity, abundance, shift, and host-microbiome interplay for bovine infertility cases such as repeat breeding syndrome (RBS). This review summarizes the occurrence and persistence of microbial taxa to gain a better understanding of reproductive performance and its implications. Further, we also discuss the possibilities of microbiome manipulation strategies to enhance bovine fecundity.

A 3-year-old, 420 g, intact male African pygmy hedgehog (Atelerix albiventris) was presented with a sudden appearance of a mass protruding from its preputium. A detailed physical examination revealed the presence of a polyp-like mass, connected to the mucous membrane of the penis and a second, multilobular mass with a larger base. Both masses were surgically removed. While the histopathological examination of the polyp-like mass revealed only a chronic active inflammatory reaction, the histopathological examination of the multilobular mass revealed a tumorous tissue composed of spindle-shaped cells, irregularly oval or polygonal in some places. Focal tumour cells with a myxoid differentiation were observed in the greater part of this tumour. The stroma was made up of sparse fibrous tissue. The surface epithelium was hyperplastic with ulcerations and necrosis. The tumour was classified as a myxofibrosarcoma. Two weeks post-surgery, the patient did not show any clinical signs of the presented disease. According to our knowledge, this is the first published case of the surgical treatment of penile myxofibrosarcoma in an African pygmy hedgehog.

The cattle in the Pantanal region show a notable influence from Bos indicus breeds and their crossbreeds. However, a comprehensive biometric assessment of the reproductive system in these animals is currently lacking. This study evaluated the effects of breed, age, carcass weight, and estrous cycle phase on female reproductive system morphometry. A total of 124 healthy, non-pregnant reproductive tracts (83 Nelore and 41 Crossbred) were collected at a slaughterhouse. Neither the volume and weight of the ovaries nor the majority of uterine dimensions were affected by breed. Compared to heifers, cows showed longer uterine horns, a larger external caudal diameter of the uterine horns and body, and a greater external cranial diameter and internal caudal diameter of the cervix. The carcass weight (below vs. within commercial weight) affected the length of the uterine horns, uterine body, and cervix. Ovaries with a corpus luteum presented higher volume and weight than those with only follicles. Although the uterine measurements in the luteal phase were increased, the cycle stage did not affect the uterine morphometry. The average number of cervical rings was 5.0, independent of weight or breed. Crossbred animals presented a higher first cervical ring. Age didn´t influence the number, height, or distance between cervical rings. Deviation from the normal alignment of the cervix was recorded in 14.29 % of the animals, with a higher occurrence among Nelore cattle; deviation from the median axis was the most common (30%). This study emphasizes various parameters influencing the morphometry of the female reproductive system in Nelore cattle and their crosses, which could be crucial for implementing reproductive biotechnology techniques better suited to the morphological characteristics of zebu breeds. [ABSTRACT FROM AUTHOR]

A 3-year-old, 420 g, intact male African pygmy hedgehog (Atelerix albiventris) was presented with a sudden appearance of a mass protruding from its preputium. A detailed physical examination revealed the presence of a polyp-like mass, connected to the mucous membrane of the penis and a second, multilobular mass with a larger base. Both masses were surgically removed. While the histopathological examination of the polyp-like mass revealed only a chronic active inflammatory reaction, the histopathological examination of the multilobular mass revealed a tumorous tissue composed of spindle-shaped cells, irregularly oval or polygonal in some places. Focal tumour cells with a myxoid differentiation were observed in the greater part of this tumour. The stroma was made up of sparse fibrous tissue. The surface epithelium was hyperplastic with ulcerations and necrosis. The tumour was classified as a myxofibrosarcoma. Two weeks post-surgery, the patient did not show any clinical signs of the presented disease. According to our knowledge, this is the first published case of the surgical treatment of penile myxofibrosarcoma in an African pygmy hedgehog. [ABSTRACT FROM AUTHOR]

To locate and fertilize the egg, sperm probe the varying microenvironment prevailing at different stages during their journey across the female genital tract. To this end, they are equipped with a unique repertoire of mostly sperm-specific proteins. In particular, the flagellar Ca2+ channel CatSper has come into focus as a polymodal sensor used by human sperm to register ligands released into the female genital tract. Here, we provide the first comprehensive study on the pharmacology of the sperm-specific human Slo3 channel, shedding light on its modulation by reproductive fluids and their constituents. We show that seminal fluid and contained prostaglandins and Zn2+ do not affect the channel, whereas human Slo3 is inhibited in a non-genomic fashion by diverse steroids as well as by albumin, which are released into the oviduct along with the egg. This indicates that not only CatSper but also Slo3 harbours promiscuous ligand-binding sites that can accommodate structurally diverse molecules, suggesting that Slo3 is involved in chemosensory signalling in human sperm.

Given the physiological function and anatomical location of the reproductive tract, studying the upper reproductive tract microbiota may be essential for studying male infertility and other male diseases. This study aimed to characterize the microbiota of the upper reproductive tract male rats and investigate whether specific microbial compositions are associated with sperm parameters. 16S rRNA gene sequencing was used to characterize the microbial composition in the testis, epididymis, seminal vesicles, vas deferens and prostate tissues of the rats. The results showed significant enrichment of Methyloperoxococcus spp. in testicular tissues, Jeotgalicoccus spp. in epididymal tissues. Spearman's correlation analysis revealed that the abundance of several bacterial genera in epididymal, testicular, and seminal vesicle gland tissues correlated with several sperm activity parameters. Our findings provide detailed information on characterizing the upper reproductive tract microbiome in male rats, as well as a potentially crucial link between the reproductive system microbiota and sperm quality.

In May 2021, one of the authors collected 22 specimens of land mollusks in the Khoja Mohammed Ridge,located in the northeastern part of Afghanistan. Shellis extraordinary, similar to Fruticicola perlucens(Rosen, 1903).However, having a number of differences,includinga finely grained sculpture of the embryonic whorls,smoothly ribbed last whorl,evenly turned edges oftheaperture, a strongly blurred white lip,anda clearly pronounced swollen base of the stylophore of this species,makes it describeofFruticicolapseudoperlucenssp. nov.as new species to science.

Introduction: Diabetes causes testicular damage due to oxidative stress. Nowadays, the use of vitamins and antioxidants is one of the common methods to treat this disease. Therefore, the aim of this study is to investigate the effect of single and combined administration of these two substances on the reproductive system of male diabetic rats. Method and materials: In this study, 48 adult male Wistar rats weighing 250–270 grammes were divided into 6 groups: Control group, diabetic group, vehicle group, vitamin E, curcumin group, and vitamin E and curcumin group. The control group was the healthy group, and in the other groups, the rats were made diabetic by streptozotocin (60 mg/kg/ip). The vehicle group received 1 ml of olive oil, the vitamin E group (100 mg/kg/ip) received Vit.E, and the curcumin group (50 mg/kg/ip) received Cu. The group of rats received vitamin E and curcumin. At the end of the sixth week after treatment, blood was taken from the rats and biochemical analysis was performed to check the amount of malondialdehyde (MDA), LH hormones and serum testosterone, then the rats were killed and their testes and epididymides were removed. The weight of the testes and sperm parameters, the maturity of sperm nuclei and the integrity of their DNA were checked. The number of spermatogenic cells was determined by histological examination. Results: This study showed that diabetes caused a decrease in testicular weight, sperm count, motility, and viability, an increased percentage of sperm with immature nuclei, and an increased percentage of sperm with denatured DNA. In addition, diabetes decreased the average number of matogenic sperm, and biochemical results showed that diabetes increased the level of MDA and decreased the level of the hormones LH and testosterone. Treatment with vitamin E, curcumin and their combination improved all these parameters, and this improvement was significant in the Toam group. Conclusion: Combined administration of vitamin E and curcumin in diabetic rats significantly improves sperm parameters, matogenic sperm count, and improves MDA levels, LH, and serum testosterone compared with separate treatment.

Purpose: Testicular cancer is the most frequent malignant tumour among young adults. Therefore, regular self‐examination for early detection is recommended by all guidelines. The fact that the knowledge of young adults living in Austria on this important topic is unknown, prompted the current investigation. Materials and methods: To evaluate the knowledge on anatomy and function of the male reproductive tract and of testicular cancer in particular a German questionnaire recently developed by Anheuser et al. (Urologe 2019;58:1331‐1337) was applied. This 4‐page questionnaire contains mainly multiple‐choice questions. This questionnaire was distributed in three different schools to male and female students in the 11th and 12th school level. Results: A total of 337 students (mean age: 17.3 years; male: n = 183; female: n = 154) completed the questionnaire. In a simple pictogramm, 63% were able to correctly identify the prostate, 87% the testis and 64% the epididymis. Half of the students (49.3%) could describe the function of the testis. The question regarding the age peak of testicular cancer was correctly answered by 81%, yet 18% believed that testicular cancer is caused by the sexual contact. The purpose of the testicular self‐examination was correctly answered by only 54.9% with a higher rate for women (67.5% vs. 44.3%, p = 0.001). With a theoretical maximal score of 15, the students reached a mean overall of 10.4 with no sex difference (p > 0.05). Differences were noted for the school type: the highest score was present in the Gymnasium (11.2), followed by the Realgymnasium (10.8) and the HTL (9.8; p = 0.001). Conclusions: This survey demonstrates relevant knowledge deficits of young adults regarding the male reproductive tract, testicular cancer and self‐examination. [ABSTRACT FROM AUTHOR]

Artificial insemination is a standard practice in the turkey breeder industry to ensure the production of fertile eggs. Even though hens are inseminated on a weekly basis, their fertility tends to decline after a few weeks of production. Avian species have a specialized structures called sperm storage tubules (SSTs), located in the uterovaginal junction (UVJ) of the oviduct. The ability of SSTs to store sperm is directly correlated with the fertility of the hen. The objective of the study was to examine changes in the transcriptome of the turkey hen’s UVJ in response to the presence of sperm at three key stages of production. We hypothesized that repeated and prolonged exposure to sperm would alter the transcriptome of the UVJ. Samples were collected from virgin hens prior to the onset of lay, as well as from sham-inseminated (extender only) and semen-inseminated hens at early lay, peak lay, and late lay. Gene expression profiling of the UVJ was examined, and a differential expression analysis was conducted through pairwise comparisons between semen- and sham-inseminated groups at each production stage and across production stages. In the early laying stage, no significant gene expression changes were found between semen- and shaminseminated groups. However, at peak lay, genes related to lipid biosynthesis, Wnt signaling, cell proliferation, and O-glycan biosynthesis were upregulated in the semen group, while the immune response and cytokine-cytokine receptor interaction were downregulated. In the late lay stage, the transcription pathway was upregulated in the semen group, whereas the translation pathway was downregulated. The local immune response that was suppressed during peak lay was increased at the late laying stage. In the semen-inseminated group, the UVJ exhibited advanced aging at the late laying stage, evidenced by reduced telomere maintenance and translation processes. The results from this study provide valuable insights into the alteration of the UVJ function in response to the presence of sperm at different stages of production and throughout the production cycle. Targeting the modulation of local immune response and addressing aging processes after peak production could potentially prevent or delay the decline in fertility of turkey breeder hens. [ABSTRACT FROM AUTHOR]

The extinction of most wild avian species is becoming apprehensive and some water fowls like the spur-winged goose (Plectropterus gambensis) may represent a good model for research, to advance wildlife conservation of related avian species. Currently, there are no baseline information regarding the anatomic characteristics of the reproductive tract of this species, hence; the present study aimed at investigating the gross and histological features of the ovary and oviduct of the wild spur-winged goose. A total of five female adults spur-winged geese with ages between eight to ten months old were used for this study. The bird were purchased from a farm and transported to the Laboratory for quick decapitation and tissue processing. The birds were allowed to acclimatized for seven days, before humanely sacrificed by quick cervical dislocation and reproductive organs (ovary and oviduct) were harvested for both gross and histological evaluations. Thereafter, the ovary and oviduct were fixed, and stained with H & E for light microscopic evaluation using DB2 -180M Digital Biological Microscope at different magnifications (×40, ×100, and ×400). The gross finding on the ovary revealed that it is ovoid in shape and appeared as a cluster of sacs showing yellowish to whitish follicles of different sizes and have a poorly defined oviductal segment. The oviduct appeared to be the longest part of the female reproductive tract (12.5-14.5cm). Histologically, the ovary is characterized by a membrana granulosa surrounding the oocytes at various stages of development. Also, the oviduct is by simple cuboidal to columnar ciliated secretory epithelium, and connects the ovary to the cloaca as a thin and un-convoluted tube. In conclusion, this study provided valuable information to serve as a baseline model to further research and understand the reproductive anatomy of other related domestic and wild waterfowl species. [ABSTRACT FROM AUTHOR]

Abstract Background Endometritis is a prevalent and challenging condition that affects livestock, and its effective treatment is the use of intrauterine antibiotics. Antibiotic use may lead to negative consequences, including residue in tissues and the emergence of antibiotic resistance. Objectives The aim of this study was to assess the therapeutic potential of ozonated bidistilled water in the treatment of Escherichia coli‐induced endometritis in rat models, comparing it to conventional antibiotic treatment. Methods A total of 21 female Wistar Albino rats were used for this study. E. coli from the uterus of cows with endometritis at a concentration of 1.0 × 109 cfu/mL inoculated into rat uteruses. After inoculation, it was confirmed macroscopically that experimental endometritis was induced in all individuals. And, the rats with endometritis were randomly divided into three groups treated with intrauterine bidistilled water enriched with ozone, antibiotics and 0.9% NaCl. The uterine tissues were examined histopathologically. Results In the semiquantitative analyses, significantly lower histopathological scores were observed for both the bidistilled water enriched with ozone and antibiotic‐treated endometritis groups compared to the control group (p < 0.05). Conclusions Ozone‐enriched bidistilled water can be used in the treatment of experimentally induced endometritis in rats, and can provide effective microbiological and histopathological improvement. Further studies involving larger populations of different species are needed to determine the medical suitability of this new treatment.

This document is an editorial published in Frontiers in Cell & Developmental Biology titled "In celebration of women in molecular and cellular reproduction." The editorial highlights the contributions of women in scientific research, particularly in the field of reproductive biology. It emphasizes the importance of recognizing and valuing women's contributions in scientific publications and showcases a Research Topic in the journal that features eleven articles authored by women scientists from different continents. The articles cover various topics related to sperm, eggs, embryos, and female fertility, providing valuable insights and potential therapeutic interventions for infertility-related challenges. The editorial concludes by acknowledging the remarkable progress made by women in reproductive biology and their efforts to overcome barriers to fertility and reproductive health. [Extracted from the article]

β-Nerve growth factor (β-NGF) is a protein produced in the reproductive tract of camelids (camels, llamas, and alpacas) that has been identified as the ovulation inducing factor in seminal plasma. β-NGF from seminal plasma deposited into the reproductive tract of the female camelid acts systemically to stimulate the secretion of luteinizing hormone (LH) from the anterior pituitary, which in turn induces follicle maturation and ovulation. The objectives of the present study were to determine if β-NGF is present in the reproductive tract of the stallion and identify the specific site(s) of production. The hypotheses were that β-NGF would be present in the stallion reproductive tract and would primarily be localized in Sertoli cells of the testes and the prostate gland. Immunohistochemistry on paraffin-embedded paraformaldehyde-fixed tissues was performed using a rabbit polyclonal anti-β-NGF antibody on a total of six male equine reproductive tracts, including a one-day old colt, a one-year-old colt, and four adult stallion tracts. Strong immunostaining was observed in the efferent ducts of the testes and the epithelial cells of the prostate, seminal vesicles, bulbourethral glands, and ampullae. Weaker β-NGF staining was noted in Leydig cells, Sertoli cells, and spermatogonia within the testes and in epithelial cells of the epididymis. In conclusion, immunohistochemistry revealed that β-NGF is present in the stallion reproductive tract, and the protein is primarily present in the efferent ducts of the testes and in all accessory sex glands.

As demand for animal protein rises, raising Japanese quail holds much potentials in bridging the gap. Phytogenics has been reported to have effect on spermiogramic parameters of animals. This research was done to ascertain the spermiogramic parameters of Japanese quails to administration of aqueous solution of egg lime molasses mixture (ELM). Fresh eggs were placed in a dish, followed by 500g of molasses and 1 liter of lime juice. It was then covered for 10 days and the entire mixture was blended. Two hundred day old Japanese quails were assigned to five treatments in a Completely Randomized Design and were subdivided into 4 replicates of 10 birds each. The control (T1) having no administration of ELM, T2 had an inclusion level of 10 mL, T3: 20 mL, T4: 30 mL and T5: 40 mL, all in 500 mL of water. Feed and water were provided ad libitum. The study was carried out for 49 days. Data were collected on genitalia morphometry and fertilizing potentials. The birds administered 20 mL of ELM had significantly (p

Objective: The aim was to investigate whether a bacterial flora exists in the eggs of healthy laying ducks (Ma breed), and if yes, whether the bacterial flora could be associated with those in the genital tract and cecum. Methods: Healthy laying ducks were dissected to collect genital tract and cecum tissues, as well as soft- and hard-shelled duck eggs, and cultivable bacteria were counted by plate count method, and the diversity and correlation of uncultured bacterial flora were analyzed by MiSeq high-throughput sequencing. Results: The decreasing order of the total bacterial counts in the samples was cecum > genital tract > hard-shelled egg > soft-shelled egg. The bacterial gene sequences belonged to 56 phyla and 1 319 genera. The abundance and species evenness of bacteria in the cecum and genital tract were higher. The dominant genera included Bacteroides, Megamonas and Campylobacter. Species abundance and dominant concentration were higher in soft- and hard-shell eggs. Pseudomonas and Acinetobacter accounted for 19.01% and 10.01% of the total abundance, respectively. Gene function prediction showed that all samples had high abundance of metabolic and glycolytic functions. The gram-positive and anaerobic phenotypes in the cecum and genital tract were abundant. The pathogenicity and oxidative stress of bacteria in soft and hard shell eggs were significant. The dominant bacterial genera in the four samples were overlapped, and the overlap rates of egg content with the cecum and genital tract were 13.96% and 24.35%, respectively. In addition, the phylogenetic tree analysis showed that the genera in all samples were closely related to each other and shared homology with the significantly contributing genus Bacteroides in the cecum. Conclusion: Duck eggs are not formed in a sterile environment, the bacteria residing in the cecum and reproductive tract of healthy laying ducks can infect different egg structures during its formation and become a part of the internal flora in duck eggs. These results can provide a reference for further research on the characteristics and control of non-pathogenic bacteria in egg contents.

Abstract Background The female reproductive tract is exposed directly to the male’s ejaculate, making it a hotspot for mating-induced responses. In Drosophila melanogaster, changes in the reproductive tract are essential to optimize fertility. Many changes occur within minutes after mating, but such early timepoints are absent from published RNA-seq studies. We measured transcript abundances using RNA-seq and microRNA-seq of reproductive tracts of unmated and mated females collected at 10–15 min post-mating. We further investigated whether early transcriptome changes in the female reproductive tract are influenced by inhibiting BMPs in secondary cells, a condition that depletes exosomes from the male’s ejaculate. Results We identified 327 differentially expressed genes. These were mostly upregulated post-mating and have roles in tissue morphogenesis, wound healing, and metabolism. Differentially abundant microRNAs were mostly downregulated post-mating. We identified 130 predicted targets of these microRNAs among the differentially expressed genes. We saw no detectable effect of BMP inhibition in secondary cells on transcript levels in the female reproductive tract. Conclusions Our results indicate that mating induces early changes in the female reproductive tract primarily through upregulation of target genes, rather than repression. The upregulation of certain target genes might be mediated by the mating-induced downregulation of microRNAs. Male-derived exosomes and other BMP-dependent products were not uniquely essential for this process. Differentially expressed genes and microRNAs provide candidates that can be further examined for their participation in the earliest alterations of the reproductive tract microenvironment.

Gap junctions mediate intercellular communications across cellular networks in the nervous and immune systems. Yet their roles in intestinal innate immunity are poorly understood. Here, we show that the gap junction/innexin subunit inx-14 acts in the C. elegans gonad to attenuate intestinal defenses to Pseudomonas aeruginosa PA14 infection through the PMK-1/p38 pathway. RNA-Seq analyses revealed that germline-specific inx-14 RNAi downregulated Notch/GLP-1 signaling, while lysosome and PMK-1/p38 pathways were upregulated. Consistently, disruption of inx-14 or glp-1 in the germline enhanced resistance to PA14 infection and upregulated lysosome and PMK-1/p38 activity. We show that lysosome signaling functions downstream of the INX-14/GLP-1 signaling axis and upstream of PMK-1/p38 pathway to facilitate intestinal defense. Our findings expand the understanding of the links between the reproductive system and intestinal defense, which may be evolutionarily conserved in higher organism. [ABSTRACT FROM AUTHOR]

Simple Summary: The koala has recently been listed as an endangered species in the northern part of its range where it faces significant challenges associated with habitat fragmentation, climate change, and disease. Fundamental to its conservation is a detailed knowledge of its reproductive system, particularly with respect to what represents normal anatomy and/or pathology. In order to conserve we must first understand. This article brings together findings from two PhD theses that provide a detailed description of the female koala reproductive anatomy and histology through different presumptive stages of the reproductive cycle. The koala (Phascolarctos cinereus), while being an iconic Australian marsupial, has recently been listed as endangered. To establish an improved understanding of normal reproductive anatomy, this paper brings together unpublished research which has approached the topic from two perspectives: (1) the establishment of an artificial insemination program, and (2) the definition of Chlamydia spp.-derived histopathological changes of the female koala urogenital system. Based on the presentation and histological processing of over 70 opportunistic specimens, recovered from wildlife hospitals in Southeast Queensland (Australia), we describe the gross and microanatomy of the koala ovary, oviduct, uteri, vaginal complex, and urogenital sinus during the interestrous, proliferative, and luteal phases of the reproductive cycle. [ABSTRACT FROM AUTHOR]

Background: Endometritis is a prevalent and challenging condition that affects livestock, and its effective treatment is the use of intrauterine antibiotics. Antibiotic use may lead to negative consequences, including residue in tissues and the emergence of antibiotic resistance. Objectives: The aim of this study was to assess the therapeutic potential of ozonated bidistilled water in the treatment of Escherichia coli‐induced endometritis in rat models, comparing it to conventional antibiotic treatment. Methods: A total of 21 female Wistar Albino rats were used for this study. E. coli from the uterus of cows with endometritis at a concentration of 1.0 × 109 cfu/mL inoculated into rat uteruses. After inoculation, it was confirmed macroscopically that experimental endometritis was induced in all individuals. And, the rats with endometritis were randomly divided into three groups treated with intrauterine bidistilled water enriched with ozone, antibiotics and 0.9% NaCl. The uterine tissues were examined histopathologically. Results: In the semiquantitative analyses, significantly lower histopathological scores were observed for both the bidistilled water enriched with ozone and antibiotic‐treated endometritis groups compared to the control group (p < 0.05). Conclusions: Ozone‐enriched bidistilled water can be used in the treatment of experimentally induced endometritis in rats, and can provide effective microbiological and histopathological improvement. Further studies involving larger populations of different species are needed to determine the medical suitability of this new treatment. [ABSTRACT FROM AUTHOR]

A 10-year-old female spayed mixed breed dog was evaluated for diarrhea and vomiting. Diagnostic imaging demonstrated the presence of an intracardiac mass. A modified Seldinger technique was used to access the right jugular vein, and an endomyocardial biopsy forceps was introduced through a sheath to obtain several biopsies. Histopathology and immunohistochemistry demonstrated a paraganglioma. The dog underwent 1 fraction of radiotherapy and l-asparaginase chemotherapy and was discharged. The dog developed a pulmonary thromboembolism 2 days after radiotherapy and chemotherapy, and the owner elected humane euthanasia. Although long-term assessment of treatment response was unable to be performed, this novel diagnostic option could be considered for similar cases due to success in obtaining a histopathologic diagnosis, which is essential in developing a disease-specific treatment plan. This report also describes the use of radiotherapy for primary treatment of an intracardiac neoplasm, which can be a consideration in the future.

Abstract Background Ovariohysterectomy (OHE) induces inflammation and stress in female dogs. The anti‐inflammatory effects of melatonin have been reported in several studies. Objectives The goal of this study was to assess the effects of melatonin on the concentrations of melatonin, cortisol, serotonin, α‐1‐acid glycoprotein (AGP), serum amyloid A (SAA), c‐reactive protein (CRP), interleukin‐10 (IL‐10), interleukin‐8 (IL‐8), interleukin‐1β (IL‐1β) and tumour necrosis factor‐α (TNF‐α) before and after OHE. Methods The total number of animals was 25 and aligned in 5 groups. Fifteen dogs were divided into three groups (n = 5): melatonin, melatonin+anaesthesia and melatonin+OHE and received melatonin (0.3 mg/kg, p.o.) on days –1, 0, 1, 2 and 3. Ten dogs were assigned to the control and OHE groups (n = 5) without melatonin treatment. OHE and anaesthesia were performed on day 0. Blood samples were obtained via jugular vein on days –1, 1, 3 and 5. Results Melatonin and serotonin concentrations significantly increased in the melatonin, melatonin+OHE and melatonin+anaesthesia groups compared with the control group, while cortisol concentration decreased in the melatonin+OHE group compared with the OHE group. The concentrations of acute‐phase proteins (APPs) and inflammatory cytokines significantly increased after OHE. The CRP, SAA and IL‐10 concentrations decreased significantly in the melatonin+OHE group compared with the OHE group. The concentrations of cortisol, APPs and proinflammatory cytokines increased significantly in the melatonin+anaesthesia group compared with the melatonin group. Conclusions The oral administration of melatonin before and after OHE help controlling the high levels of inflammatory APPs, cytokines and cortisol induced by OHE in female dogs.

ABSTRACT. Bunting semu pada kelinci dapat terjadi karena adanya induksi secara hormonal dan stimulasi fisik yang dapat menyebabkan perubahan pada morfologi saluran reproduksi. Salah satu metode induksi bunting semu adalah melalui injeksi GnRH. Penelitian ini bertujuan mengidentifikasi perubahan terhadap anatomi dan histologi saluran reproduksi pada kelinci lokal bunting semu yang diinduksi dengan penyuntikan GnRH. Dalam penelitian ini digunakan sembilan ekor kelinci betina lokal, berumur 1-2 tahun dengan bobot badan 1,8-2,2 kg. Kelinci yang dibagi ke dalam tiga kelompok perlakuan (n=3) yakni K1, K2, dan K3. Kelompok K1 (kontrol negatif), diinjeksi dengan 0,1 ml NaCl fisiologis tanpa perkawinan; K2 (kontrol positif), kelinci diinduksi dengan 100 IU PMSG, tiga hari kemudian dikawinkan dan diinjeksi 75 IU hCG; dan K3, kelinci diinduksi dengan penyuntikan 5 µg GnRH secara intravena. Pada hari ke-8 setelah perlakuan seluruh kelinci disembelih lalu saluran reproduksi diambil untuk pengamatan morfologi dan morfometri oviduk, kornua uteri, serviks uteri dan vagina lalu diproses secara histoteknik dan diwarnai dengan pewarnaan hematoksilin dan eosin untuk pengamatan histologi dan histomorfometri. Panjang oviduk, kornua, dan vagina kelinci memperlihatkan perbedaan yang nyata (P0,05) antar K1 dan K2 dengan K3. Ketebalan lapisan muskularis ampula, lamina propia isthmus, lamina muskularis isthmus, tunika serosa isthmus memperlihatkan perbedaan yang nyata (P0,05) antara K1 dan K2 dengan K3. Tebal lapisan endometrium kornua uterus K2 berbeda sangat nyata (P0,05) dengan K3, namun tidak berbeda nyata (P0,05) dibandingkan K1. Lapisan serosa serviks uteri K1 dan K2 berbeda sangat nyata (P0,05) dengan K3. Histomorfometri vagina kelinci menunjukkan perbedaan yang nyata (P0,05). Berdasarkan hasil penelitian dapat disimpulkan bahwa induksi GnRH tidak menyebabkan perubahan morfologi dan morfometri saluran reproduksi kelinci lokal pada hari ke-8 setelah induksi. (Morphology and morphometry changes of reproductive tract in the pseudo pregnant does using GnRH) ABSTRAK. Pseudopregnancy in rabbits can occur due to hormonal induction and physical stimulation that can cause changes in the morphology of the reproductive tract. One method of hormonal induction is GnRH injection. This study aimed to determine the anatomical and histological changes of the reproductive tract in pseudo pregnant local rabbits induced by injection of GnRH. In this study, nine local female rabbits, aged 1-2 years with a body weight of 1.8-2.2 kg, were divided into three treatment groups (n=3), namely, K1 (negative control): injected with 0.1 ml of physiological NaCl without mating, K2 (positive control): injected with 100 IU PMSG and then mated with male rabbits after three days of injection and followed by injection of 75 IU Hcg; K3 injection 5µg of GnRH intravena route. On the day-8 after treatment, all rabbits were slaughtered and the reproductive tract was collected for morphological and morphometric observation of the oviduct, uterine horn, uterine cervix, and vagina, and then processed histotechnically and stained with hematoxylin and eosin for histological and histomorphometric observation. The length of oviduct, uterine horn and vagina showed significant different (P0.05) between K1 and K2 with K3. The thickness of the lamina muscularis of ampulla, lamina propia of isthmus, lamina muscularis of isthmus, tunica serous of isthmus showed significant different (P0.05) between K1 and K2 with K3.The thickness of the endometrium of uterine horn was significant different (P0.05) between K2 and K3, but not significantly different (P0.05) with K1. The thickness of tunica serous of servical uterine K1 and K2 was significant different (P0.05) with K3. Vaginal histomorphometry of rabbits was not significantly different (P0.05). It can be concluded that the induction of GnRH did not changes the morphology and histology of the reproductive tract in the local rabbits on the day-8 after treatment.

Arcanobacterium hippocoleae is a Gram-positive fastidious bacterium and is occasionally isolated from the reproductive tract of apparently healthy mares (Equus caballus) or from mares with reproductive tract abnormalities. Apart from a few 16S rRNA gene-based GenBank sequences and one recent report on complete genome assembly, detailed genomic sequence and clinical experimental data are not available on the bacterium. Recently, we observed an unusual increase in the detection of the organism from samples associated with mare reproductive failures in Atlantic Canada. Two colony morphotypes (i.e., small, and large) were detected in culture media, which were identified as A. hippocoleae by MALDI-TOF mass spectrometry and 16S rRNA gene sequencing. Here, we report the whole genome sequencing and characterization of the morphotype variants. The genome length of the large phenotypes was between 2.42 and 2.43, and the small phenotype was 1.99 Mbs. The orthologous nucleotide identity between the large colony phenotypes was ~99%, and the large and small colony phenotypes was between 77.86 and 78.52%, which may warrant the classification of the two morphotypes into different species. Phylogenetic analysis based on 16S rRNA genes or concatenated housekeeping genes grouped the small and large colony variants into two different genotypic clusters. The UvrA protein, which is part of the nucleotide excision repair (NER) system, and 3-isopropoylmalate dehydratase small subunit protein expressed by the leuD gene were identified as potential virulence factors in the large and small colony morphotypes, respectively. However, detailed functional studies will be required to determine the exact roles of these and other identified hypothetical proteins in the cellular metabolism and potential pathogenicity of A. hippocoleae in mares.

Artificial insemination is a standard practice in the turkey breeder industry to ensure the production of fertile eggs. Even though hens are inseminated on a weekly basis, their fertility tends to decline after a few weeks of production. Avian species have a specialized structures called sperm storage tubules (SSTs), located in the uterovaginal junction (UVJ) of the oviduct. The ability of SSTs to store sperm is directly correlated with the fertility of the hen. The objective of the study was to examine changes in the transcriptome of the turkey hen’s UVJ in response to the presence of sperm at three key stages of production. We hypothesized that repeated and prolonged exposure to sperm would alter the transcriptome of the UVJ. Samples were collected from virgin hens prior to the onset of lay, as well as from sham-inseminated (extender only) and semen-inseminated hens at early lay, peak lay, and late lay. Gene expression profiling of the UVJ was examined, and a differential expression analysis was conducted through pairwise comparisons between semen- and sham-inseminated groups at each production stage and across production stages. In the early laying stage, no significant gene expression changes were found between semen- and sham-inseminated groups. However, at peak lay, genes related to lipid biosynthesis, Wnt signaling, cell proliferation, and O-glycan biosynthesis were upregulated in the semen group, while the immune response and cytokine-cytokine receptor interaction were downregulated. In the late lay stage, the transcription pathway was upregulated in the semen group, whereas the translation pathway was downregulated. The local immune response that was suppressed during peak lay was increased at the late laying stage. In the semen-inseminated group, the UVJ exhibited advanced aging at the late laying stage, evidenced by reduced telomere maintenance and translation processes. The results from this study provide valuable insights into the alteration of the UVJ function in response to the presence of sperm at different stages of production and throughout the production cycle. Targeting the modulation of local immune response and addressing aging processes after peak production could potentially prevent or delay the decline in fertility of turkey breeder hens.

Aim of study: To evaluate the utility of B-mode and Power Doppler ultrasonography to predict ovulation time in Holstein cows by assessment of uterine and follicle measurements. Area of study: Galicia, NW Spain Material and methods: 33 Holstein cows were examined every 12 h until ovulation. Measurements for the ratio endometrium/myometrium (END/MYO), uterine lumen (UL), diameter of the dominant follicle (DF), and Power Doppler of the dominant follicle and corpus luteum were recorded. The times of onset of heat, maximum heat (MHA) and heat finalization were obtained from the database of monitoring devices. Blood samples were taken at each examination for progesterone (P4) determination. Data were analyzed using one-way ANOVA and Pearson’s χ2 tests. Main results: For UL, time -6 (1.53 mm) with respect to ovulation (time 0) significantly differed from time -42 (5.70 mm). Concerning DF, significant differences were observed between time -6 (20.48 mm) and time -54 (16.60 mm). As for P4, significant differences were found between time -6 (0.34 ng/mL) and time -54 (1.03 ng/mL). Considering MHA, significant differences were observed for the UL between after and before/during groups; for DF, significant differences were found before and after MHA. As for heat, the UL significantly differed between after and before/during groups. Significant differences were found for the percentage of cows with Doppler signal in the ovulatory follicle and corpus luteum concerning MHA and heat factors. Research highlights: The use of Power Doppler to predict ovulation time needs to be refined. The END/MYO and UL measurements could be useful to identify cows in heat, but inaccurate to determine ovulation.

ABSTRACT: In mammals, molecules mainly secreted by white adipose tissue named adipokines are also synthetized locally in the reproductive tract and are able to influence reproductive functions. In avian species, previous studies indicated that the adipokine chemerin is highly abundant in the albumen, compared to the yolk and this was associated to high chemerin expression in the magnum. In addition, the authors observed that chemerin and its receptors are expressed by allantoic and amniotic membranes and chemerin is present in fluids during the embryo development. Here, we studied other adipokines, including adiponectin, visfatin, apelin, and adipolin in egg white and their known receptors in the active (egg-laying hen) and regressed (hen not laying) oviduct and embryonic annexes during embryo development. By using Western blot, RT-qPCR analysis and immunohistochemistry, we demonstrated the expression of different adipokines in the egg albumen (visfatin) and the reproductive tract (adiponectin, visfatin, apelin, adipolin, and their cognate receptors) according the position of egg in the oviduct. We showed that the expression of adipokines and adipokines receptors was strongly reduced in the regressed oviducts (arrested laying hen). Results indicated that visfatin and adiponectin appeared at ED11 to 14 and increased until ED18 in amniotic fluid whereas it was found from ED7 and was unchanged during embryo development in allantoic fluid. Taken together, adipokines and their receptors are expressed in the egg white, the reproductive tract and the embryonic annexes. Data obtained suggest important functions of theses metabolic hormones during the chicken embryo development. Thus, adipokines could be potential biomarkers to improve the embryo development.

For decades, the endometrium was considered to be a sterile environment. However, now this concept is disputed, and there is growing evidence that microbiota composition might affect endometrial receptivity. Routine clinical management of infertility is still limited to a microbiological assessment of the lower reproductive tract. The purpose of this study was to compare the abundance of various bacterial, fungal, and viral species, qualitatively and quantitatively, in vaginal, cervical, and endometrial biomaterial of infertile patients. A total of 300 samples from 100 infertile patients of a private assisted reproduction clinic were analyzed. A broad real-time polymerase chain reaction panel was used to identify 28 relevant microbial taxa as well as three members of the Herpesviridae family. All patients underwent endometrial biopsy for further histopathological evaluation. Analysis of the microbial diversity (within the boundaries of the detection panel) revealed that Shannon indexes in the cervix and vagina were similar (1.4 × 10−2 (1.6 × 10−3 – 6.5 × 10−1) vs 1.9 × 10−2 (2.3 × 10−3 – 5.3 × 10−1), respectively, p = 0.502), whereas endometrial indexes differed significantly from both regions (0 (0 – 1.4 × 10−1), p < 0.0001). Surprisingly, 17 microbial and viral taxa were detected in at least one sample. Endometrium exhibited a quite distinct microbiological profile, being different at the detection rates of 14 taxa (p < 0.05). Remarkably, 4% and 2% of endometrial samples were positive for Cytomegalovirus and Candida spp., respectively, while these were undetectable in corresponding cervical and vaginal samples. Prevalence of the Gardnerella vaginalis + Prevotella bivia + Porphyromonas spp. group in endometrium was associated with a low abundance of Lactobacillus spp. (p = 0.039). No noteworthy associations were identified between various microbiota characteristics and clinical parameters, such as chronic endometritis, uterine polyps and adhesions, endometriosis, and a history of sexually transmitted infections. These findings indicate that the microbiological profile of the endometrium is unique, and the analysis of the lower reproductive tract should supplement, rather than be a substitute for it. [ABSTRACT FROM AUTHOR]

As demand for animal protein rises, raising Japanese quail holds much potentials in bridging the gap. Phytogenics has been reported to have effect on spermiogramic parameters of animals. This research was done to ascertain the spermiogramic parameters of Japanese quails to administration of aqueous solution of egg lime molasses mixture (ELM). Fresh eggs were placed in a dish, followed by 500g of molasses and 1 liter of lime juice. It was then covered for 10 days and the entire mixture was blended. Two hundred day old Japanese quails were assigned to five treatments in a Completely Randomized Design and were subdivided into 4 replicates of 10 birds each. The control (T1) having no administration of ELM, T2 had an inclusion level of 10 mL, T3: 20 mL, T4: 30 mL and T5: 40 mL, all in 500 mL of water. Feed and water were provided ad libitum. The study was carried out for 49 days. Data were collected on genitalia morphometry and fertilizing potentials. The birds administered 20 mL of ELM had significantly (p <0.05) higher left epididymis weight (0.36 ± 0.05g) compared to the other groups. The inclusion of ELM in the water significantly influenced (p <0.05) left epididymis volume, paired epididymis volume, left epididymis density, paired epididymis density and spermatozoa reserves in the right epididymis. Testosterone values significantly increased (p <0.05) with increased ELM inclusion. It can be concluded that the administration of ELM did not alter growth parameters however birds that received 20 mL per 500 mL of water had the best reproductive parameters. [ABSTRACT FROM AUTHOR]

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Introduction: Despite the considerable progress made in assisted reproductive technologies (ART), the implantation rate of transferred embryos remains low and in many cases, the reasons for failure remain unclear. We aimed to determine the potential impact of female and male partners' reproductive tract microbiome composition on ART outcome. Material and methods: The ART couples (n = 97) and healthy couples (n = 12) were recruited into the study. The smaller healthy group underwent a careful selection according to their reproductive and general health criteria. Both vaginal and semen samples were subjected to 16S rDNA sequencing to reveal the bacterial diversity and identify distinct microbial community types. Ethics statement: The study was approved by the Ethics Review Committee on Human Research of Tartu University, Tartu, Estonia (protocol no. 193/T‐16) on 31 May 2010. Participation in the research was voluntary. Written informed consent was obtained from all study participants. Results: The men with Acinetobacter‐associated community who had children in the past, had the highest ART success rate (P < 0.05). The women with bacterial vaginosis vaginal microbiome community and with L. iners‐predominant and L. gasseri‐predominant microbiome had a lower ART success rate than women with the L. crispatus‐predominant or the mixed lactic‐acid‐bacteria‐predominant type (P < 0.05). The 15 couples where both partners had beneficial microbiome types had a superior ART success rate of 53%, when compared with the rest of the couples (25%; P = 0.023). Conclusions: Microbiome disturbances in the genital tract of both partners tend to be associated with couple's infertility as well as lower ART success levels and may thus need attention before the ART procedure. The incorporation of genitourinary microbial screening as a part of the diagnostic evaluation process may become routine for ART patients if our results are confirmed by other studies. [ABSTRACT FROM AUTHOR]

Background: The female reproductive tract is exposed directly to the male's ejaculate, making it a hotspot for mating-induced responses. In Drosophila melanogaster, changes in the reproductive tract are essential to optimize fertility. Many changes occur within minutes after mating, but such early timepoints are absent from published RNA-seq studies. We measured transcript abundances using RNA-seq and microRNA-seq of reproductive tracts of unmated and mated females collected at 10–15 min post-mating. We further investigated whether early transcriptome changes in the female reproductive tract are influenced by inhibiting BMPs in secondary cells, a condition that depletes exosomes from the male's ejaculate. Results: We identified 327 differentially expressed genes. These were mostly upregulated post-mating and have roles in tissue morphogenesis, wound healing, and metabolism. Differentially abundant microRNAs were mostly downregulated post-mating. We identified 130 predicted targets of these microRNAs among the differentially expressed genes. We saw no detectable effect of BMP inhibition in secondary cells on transcript levels in the female reproductive tract. Conclusions: Our results indicate that mating induces early changes in the female reproductive tract primarily through upregulation of target genes, rather than repression. The upregulation of certain target genes might be mediated by the mating-induced downregulation of microRNAs. Male-derived exosomes and other BMP-dependent products were not uniquely essential for this process. Differentially expressed genes and microRNAs provide candidates that can be further examined for their participation in the earliest alterations of the reproductive tract microenvironment. [ABSTRACT FROM AUTHOR]

Simple Summary: This study aims to identify the microbial communities in different body sites of the pregnant mare in early gestation to describe core microbiomes for each. Samples were collected from the oral cavity, vagina, anus, and the allantoic portion of the allantochorion ("placenta") from five pregnant mares between 96 and 120 days of gestation. The V4 region of the 16S rRNA gene was amplified for Illumina MiSeq sequencing to examine core bacterial communities present in the different body sites. The placenta was significantly different from feces, oral cavity, and the vagina. Alpha diversity measuring the Shannon diversity matrix was significant, with the body sites being a compounding variable, meaning there was a difference in richness and evenness in the different microbial communities. Feces had the greatest alpha diversity, while the oral cavity and placenta similarly had the least. The microbial communities of the equine placenta show similarities at the genus level to the oral cavity, both harboring Gemella and Porphyromonas. In conclusion, metagenetics did reveal distinct community differences between the oral cavity, feces, vagina, and placenta of the pregnant horse. Placentitis is the leading cause of infectious abortion in the horse. Additionally, it can result in weak and/or growth restricted offspring. While the etiology of ascending placentitis is well described in mares, less is known regarding the pathogenesis of other types, such as nocardioform placentitis. This study aims to identify the microbial communities in different body sites of the pregnant mare in early gestation to establish a core microbiome that may be perturbed in pathologic pregnancies such as placentitis. We hypothesize that the equine placenta harbors a distinct resident microbiome in early pregnancy when characterized by metagenetics and that there will be a disparity in bacterial communities from the oral, vaginal, and fecal microbiome. Samples were collected from the oral cavity, vagina, anus, and the allantoic portion of the allantochorion ("placenta") from five pregnant mares between 96 and 120 days of gestation. The V4 region of the 16S rRNA gene was amplified for Illumina MiSeq sequencing to examine core bacterial communities present in the different body sites. Microbial community composition of the pregnant ponies by body site was significantly different (Bray–Curtis dissimilarity). The placenta was significantly different from the feces, oral cavity, and vagina. Alpha diversity measuring the Shannon diversity matrix was significant, with the body sites being a compounding variable, meaning there was a difference in richness and evenness in the different microbial communities. Feces had the greatest alpha diversity, while the oral cavity and placenta similarly had the least. In conclusion, metagenetics did reveal distinct community differences in the oral, fecal, vaginal, and placenta cavities of the horse. The equine placenta does show similarities in its microbial communities to the oral cavity. Further research needs to be completed to investigate how bacteria may be translocated to the placenta from these other body sites and how they contribute to the development of placentitis. [ABSTRACT FROM AUTHOR]

Background: Ovariohysterectomy (OHE) induces inflammation and stress in female dogs. The anti‐inflammatory effects of melatonin have been reported in several studies. Objectives: The goal of this study was to assess the effects of melatonin on the concentrations of melatonin, cortisol, serotonin, α‐1‐acid glycoprotein (AGP), serum amyloid A (SAA), c‐reactive protein (CRP), interleukin‐10 (IL‐10), interleukin‐8 (IL‐8), interleukin‐1β (IL‐1β) and tumour necrosis factor‐α (TNF‐α) before and after OHE. Methods: The total number of animals was 25 and aligned in 5 groups. Fifteen dogs were divided into three groups (n = 5): melatonin, melatonin+anaesthesia and melatonin+OHE and received melatonin (0.3 mg/kg, p.o.) on days –1, 0, 1, 2 and 3. Ten dogs were assigned to the control and OHE groups (n = 5) without melatonin treatment. OHE and anaesthesia were performed on day 0. Blood samples were obtained via jugular vein on days –1, 1, 3 and 5. Results: Melatonin and serotonin concentrations significantly increased in the melatonin, melatonin+OHE and melatonin+anaesthesia groups compared with the control group, while cortisol concentration decreased in the melatonin+OHE group compared with the OHE group. The concentrations of acute‐phase proteins (APPs) and inflammatory cytokines significantly increased after OHE. The CRP, SAA and IL‐10 concentrations decreased significantly in the melatonin+OHE group compared with the OHE group. The concentrations of cortisol, APPs and proinflammatory cytokines increased significantly in the melatonin+anaesthesia group compared with the melatonin group. Conclusions: The oral administration of melatonin before and after OHE help controlling the high levels of inflammatory APPs, cytokines and cortisol induced by OHE in female dogs. [ABSTRACT FROM AUTHOR]

Neuroendocrine tumours of the gastrointestinal tract are rare. The incidence has increased in recent years due to improvements in diagnostic methods for detecting these lesions. These tumours have a poor prognosis, especially when detected at an advanced stage. The basis of the treatment is resection, and non-surgical treatments are also standard in the treatment process. The situation is similar in even rarer neuroendocrine tumours of the reproductive tract, which are associated with an equally poor prognosis. In this article, we focus on learning about the risk factors (including genetic mutations) that increase the risk of the disease and comparing the effectiveness of non-surgical treatments—chemotherapy, radiotherapy, peptide receptor radionuclide therapy, somatostatin analogues, and immunotherapy. The efficacy of these treatments varies, and immunotherapy appears to be a promising form of treatment; however, this requires further research. [ABSTRACT FROM AUTHOR]

Context: Sperm storage is a complex and highly coordinated process that is regulated by a variety of factors. The BCL 2 protein family plays a key role in regulating apoptosis, and determines sperm survival. Aims: The objective of this study was to explore the correlation between sperm storage and the BCL 2 protein family in the oviduct of Mauremys reevesii. Methods: Hematoxylin-eosin (HE) staining, immunohistochemistry (IHC) and real-time quantitative polymerase chain reaction (RT-qPCR) techniques were used to investigate three parts of the reproductive tract (isthmus, uterus and vagina) of mated and unmated female M. reevesii. Key results: Hematoxylin-eosin staining revealed many sperm stored in the oviduct. IHC showed positive immunostaining for the BCL 2 and BAX proteins in epithelial ciliated and glandular cells. RT-qPCR indicated that the mRNA expressions of anti-apoptotic genes (BCL 2 , MCL 1 , BCL - W , BCL-XL) and the androgen receptor (AR) were significantly higher in mated turtles than unmated turtles. However, the expression of pro-apoptotic genes (BAX , BAD , BID and CASPASE 3) showed the opposite relationship. Conclusions: These results suggest that sperm entering the oviduct can promote the synthesis of anti-apoptotic genes to protect themselves from various degradation factors. Implications: These findings will help researchers understand the mechanisms of sperm storage. Why do so many species have the ability to store sperm in the female reproductive tract? Sperm storage increases the chance of fertilisation in species with limited breeding opportunity. This research found androgens in the female reproductive tract of Mauremys reevesii can prolong long-term sperm storage by promoting the expression of anti-apoptotic proteins. Therefore, this study contributes to the understanding of the mechanisms of sperm storage and provides scientific guidance for artificial reproduction in turtles. [ABSTRACT FROM AUTHOR]