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1. Associations between maternal MTHFR polymorphisms and embryological outcomes in Korean patients with infertility undergoing IVF/ICSI cycles

Author

Yoo Ra Ko, Tae Hyung Kim, Eum Jin Hee, Woo Sik Lee, and Se Jeong Kim

Subjects
Methylenetetra­hydrofolatereductase, MTHFR polymorphism, ivf/icsi, oocyte maturation, embryological outcomes, Gynecology and obstetrics, RG1-991, Diseases of the endocrine glands. Clinical endocrinology, RC648-665
Abstract

Objective Methylenetetrahydrofolatereductase (MTHFR) is important for folate metabolism, which is involved in DNA synthesis and cell growth. However, the relationship between Maternal MTHFR polymorphisms and outcomes in assisted reproduction remains controversial. This is the first study to explore the effect of MTHFR polymorphisms on the embryological outcomes in in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles in Korean patients with infertility.Materials and methods This retrospective cohort study included 173 women who underwent MTHFR genotyping between July, 2021 and June, 2022. The embryologic outcomes of 301 IVF/ICSI cycles were compared between groups according to MTHFR polymorphisms using ANOVA and Chi-square test.Results Oocyte maturation rates were 80.0%, 75.0%, and 71.4% for MTHFR 677CC, 677CT, and 677TT, respectively. Cleaved embryo formation and transplantable embryo rates were comparable across various maternal MTHFR 677 genotypes. Good-quality embryo (GQE) rate was higher for MTHFR 677CT than those for 677CC and 677TT (40.0% vs. 29.4%, p = 0.001 and 40.0% vs. 33.3%, p = 0.025, respectively). When analyzing the combined MTHFR genotypes, the oocyte maturation rate was significantly lower in 677TT than in 677CC 1298AA/677CC 1298AC and 677CC 1298CC/677CT 1298AA/677CT 1298AC (71.4% vs. 76.7%, p = 0.012 and 71.4% vs. 75.7%, p = 0.029, respectively). The MTHFR 677CC/1298CC, 677CT/1298AA, and 677CT/1298AC genotypes had the highest GQE rates.Conclusions MTHFR 677TT genotype, which had the lowest enzymatic activity, had the lowest oocyte maturation rate. The combined MTHFR 677CC/1298CC, 677CT/1298AA, and 677CT/1298AC genotypes with intermediate enzyme activities had higher GQE rates. However, no differences were observed in the transplantable embryo rate between MTHFR genotypes.

Published
2024
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4. Predictive model of IVF outcomes for polycystic ovarian morphology and polycystic ovary syndrome in GnRH antagonist protocol using AMH‐MoM and ovarian sensitivity index.

Author

Ko, Yoo Ra, Yu, Eun Jeong, Park, Jae Eun, Park, Jae Kyun, Eum, Jin Hee, Kim, Tae Hyung, Lee, Woo Sik, and Lee, Hee Jun

Subjects
POLYCYSTIC ovary syndrome treatment, OVARIAN hyperstimulation syndrome, SEX hormones, OVUM, PREDICTION models, RESEARCH funding, BODY mass index, TREATMENT effectiveness, RETROSPECTIVE studies, DESCRIPTIVE statistics, FERTILIZATION in vitro, GONADOTROPIN releasing hormone, OVARIAN reserve, COMPARATIVE studies, CONFIDENCE intervals, ABORTION, CHEMICAL inhibitors
Abstract

Aim: To evaluate the relationship between AMH and ovarian response to controlled ovarian hyperstimulation in women with PCOM and PCOS. Methods: A retrospective study was conducted on 559 patients who underwent the IVF‐ET cycle between January 2018 and December 2022 at Gangnam Cha Hospital. Patients were divided into 3 groups matched for age and BMI: the PCOS group (n = 54), based on the new 2023 PCOS guideline; the PCOM group (n = 53); and the control group (n = 452) with normal ovaries. Serum AMH levels were converted to multiples of the median (MoM) for each corresponding age. The ovarian sensitivity index (OSI) was calculated as the number of retrieved oocytes divided by the total dose of recombinant FSH administered (per 1000 IU). Results: There were significant differences in AMH‐MoM value among women with PCOS [2.7 ± 1.3 (95% CI 2.3–3.0)], those with PCOM [2.0 ± 1.0 (95% CI 1.7–2.3)], and controls [0.8 ± 0.7 (95% CI 0.8–0.9)] (p < 0.001). The abortion rates in the normoovulatory, PCOM, and PCOS groups were 18.2%, 21.1%, and 25.0%, respectively. OSI and live birth rate were positively correlated with the AMH‐MoM value in normoovulatory women (r = 0.389, p < 0.05, r = 0.122, p < 0.05), while no such correlation was observed in women with PCOM and PCOS. Conclusions: Ovarian response and live birth rate are possibly correlated with the AMH‐MoM value in normoovulatory women, but not in women with PCOM and PCOS. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Clinical Usability of Embryo Development Using a Combined Qualitative and Quantitative Approach in a Single Vitrified-Warmed Blastocyst Transfer: Assessment of Pre-Vitrified Blastocyst Diameter and Post-Warmed Blastocyst Re-Expansion Speed

Author

Park, Jae Kyun, primary, Ahn, So-Yeon, additional, Seok, Su Hee, additional, Park, Sol Yi, additional, Bang, Soyoung, additional, Eum, Jin Hee, additional, Kwak, In Pyung, additional, Kim, Ji Won, additional, and Lee, Woo Sik, additional

Published
2022
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24. Effect of a dual trigger on oocyte maturation in young women with decreased ovarian reserve for the purpose of elective oocyte cryopreservation

Author

Kim, Se Jeong, Kim, Tae Hyung, Park, Jae Kyun, Eum, Jin Hee, Lee, Woo Sik, and Lyu, Sang Woo

Subjects
0301 basic medicine, Agonist, Oocyte, endocrine system, medicine.drug_class, Dual trigger, Cryopreservation, Human chorionic gonadotropin, Andrology, 03 medical and health sciences, 0302 clinical medicine, medicine, Fertility preservation, Ovarian reserve, GnRH agonist, 030219 obstetrics & reproductive medicine, business.industry, Oocyte cryopreservation, 030104 developmental biology, medicine.anatomical_structure, Reproductive Medicine, Original Article, business, hormones, hormone substitutes, and hormone antagonists, Hormone
Abstract

Objective: The aim of this study was to determine whether co-administration of a gonadotropin-releasing hormone (GnRH) agonist and human chorionic gonadotropin (hCG) for final oocyte maturation improved mature oocyte cryopreservation outcomes in young women with decreased ovarian reserve (DOR) compared with hCG alone.Methods: Between January 2016 and August 2019, controlled ovarian stimulation (COS) cycles in women (aged ≤35 years, anti-Müllerian hormone [AMH]

Published
2020
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43. Additional file 1: Table S1. of Associations between malaria and local and global climate variability in five regions in Papua New Guinea

Author

Imai, Chisato, Hae-Kwan Cheong, Kim, Ho, Honda, Yasushi, Eum, Jin-Hee, Kim, Clara, Kim, Jin, Yoonhee Kim, Swadhin Behera, Mohd Hassan, Nealon, Joshua, Hyenmi Chung, and Hashizume, Masahiro

Subjects
parasitic diseases
Abstract

The periods of time for the respective local weather and global climate models for each study locations. Table S2: The crude Pearsonâ s correlations among malaria cases and local weather factors during the study period at each study location. Figure S1: Cross-correlations for malaria cases and local weather factors. Cross-correlations identify the lagged relationships. The correlograms shows the correlations between malaria cases at time t and local weather at lag time t + k (i.e., k is a lag). Figure S2: Cross-correlations for malaria cases and global climate factors. The associations between malaria cases at time t and global climate indices at time t + k (i.e., lag). Figure S3: Time series plots for malaria cases, precipitation, and minimum temperature in each region during the study period. Figure S4: Correlation, histogram, and plot matrix for EMII, NINO3.4 Anomaly, DMI and SAM during 1997 â 2008. (PDF 1057 kb)

Published
2016
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46. Associations between malaria and local and global climate variability in five regions in Papua New Guinea

Author

Imai, Chisato, Cheong, Hae Kwan, Ho, Kim, Honda, Yasushi, Eum, Jin-Hee, other, and, Imai, Chisato, Cheong, Hae Kwan, Ho, Kim, Honda, Yasushi, Eum, Jin-Hee, and other, and

Abstract

Malaria is a significant public health issue in Papua New Guinea (PNG) as the burden is among the highest in Asia and the Pacific region. Though PNG’s vulnerability to climate change and sensitivity of malaria mosquitoes to weather are well-documented, there are few in-depth epidemiological studies conducted on the potential impacts of climate on malaria incidence in the country. Methods This study explored what and how local weather and global climate variability impact on malaria incidence in five regions of PNG. Time series methods were applied to evaluate the associations of malaria incidence with weather and climate factors, respectively. Local weather factors including precipitation and temperature and global climate phenomena such as El Niño-Southern Oscillation (ENSO), the ENSO Modoki, the Southern Annular Mode, and the Indian Ocean Dipole were considered in analyses. Results The results showed that malaria incidence was associated with local weather factors in most regions but at the different lag times and in directions. Meanwhile, there were trends in associations with global climate factors by geographical locations of study sites. Conclusions Overall heterogeneous associations suggest the importance of location-specific approaches in PNG not only for further investigations but also public health interventions in repose to the potential impacts arising from climate change.

Published
2016

47. Associations between malaria and local and global climate variability in five regions in Papua New Guinea

Author

Imai, Chisato, primary, Cheong, Hae-Kwan, additional, Kim, Ho, additional, Honda, Yasushi, additional, Eum, Jin-Hee, additional, Kim, Clara T., additional, Kim, Jin Seob, additional, Kim, Yoonhee, additional, Behera, Swadhin K., additional, Hassan, Mohd Nasir, additional, Nealon, Joshua, additional, Chung, Hyenmi, additional, and Hashizume, Masahiro, additional

Published
2016
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49. The impacts of global and local climates on dengue fever in Lao PDR and Cambodia

Author

Hashizume Masahiro, Imai Chisato, Kim Yoonhee, Kim Clara Tammy, Kim Jinseob, Honda Yasushi, Cheong Hae-Kwan, Eum Jin-Hee, Fengthong Taypasavanh, and Kim Ho

Subjects
Geography, medicine, General Earth and Planetary Sciences, Climate change, sense organs, Time series study, Socioeconomics, medicine.disease, General Environmental Science, Dengue fever
Abstract

Background: Climate change and climate variability are increasingly recognized as one of factors influencing emergence or re-emergence of vector-borne diseases such as dengue fever. For the past ye...

Published
2013
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50. Japanese Society of Tropical Medicine

Author

Imai, Chisato, Cheong, Hae-Kwan, Kim, Ho, Honda, Yasushi, Eum, Jin-Hee, Kim, Clara T., Kim, Jin Seob, Kim, Yoonhee, Behera, Swadhin K., Hassan, Mohd Nasir, Nealon, Joshua, Chung, Hyenmi, and Hashizume, Masahiro

Subjects
Papua New Guinea, Climate, parasitic diseases, Climate change, Weather, Malaria
Abstract

Background: Malaria is a significant public health issue in Papua New Guinea (PNG) as the burden is among the highest in Asia and the Pacific region. Though PNG’s vulnerability to climate change and sensitivity of malaria mosquitoes to weather are well-documented, there are few in-depth epidemiological studies conducted on the potential impacts of climate on malaria incidence in the country. Methods: This study explored what and how local weather and global climate variability impact on malaria incidence in five regions of PNG. Time series methods were applied to evaluate the associations of malaria incidence with weather and climate factors, respectively. Local weather factors including precipitation and temperature and global climate phenomena such as El Nino-Southern Oscillation (ENSO), the ENSO Modoki, the Southern Annular Mode, and the Indian Ocean Dipole were considered in analyses. Results: The results showed that malaria incidence was associated with local weather factors in most regions but at the different lag times and in directions. Meanwhile, there were trends in associations with global climate factors by geographical locations of study sites. Conclusions: Overall heterogeneous associations suggest the importance of location-specific approaches in PNG not only for further investigations but also public health interventions in repose to the potential impacts arising from climate change.

Published
2016

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