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136 results on '"Stout, Tom A.E."'

3. Effect of duration of estradiol exposure on embryo survival and endometrial gene expression in anestrous embryo recipient mares

Author

Sant´Anna Monteiro da Silva, Elisa, primary, Sanches Oquendo Júnior, Pedro, additional, Gaspari Oquendo, Fabiana Maddalena de, additional, Stout, Tom A.E., additional, de Ruijter-Villani, Marta, additional, Rodrigues, Tamiris Sabrina, additional, Beletti, Marcelo Emílio, additional, and Cuervo-Arango, Juan, additional

Published
2024
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4. Ultrasound-guided fetal thorax compression to reduce post-fixation twins in the mare

Author

Arnold, Leonie C., Stout, Tom A.E., Claes, Anthony N.J., Arnold, Leonie C., Stout, Tom A.E., and Claes, Anthony N.J.

Abstract

Background: Management of twin pregnancy after conceptus vesicle fixation in the horse is challenging because the reduction techniques described are either invasive, difficult to perform or associated with disappointing success rates. Objectives: To evaluate the success of transrectal ultrasound-guided fetal thorax compression for reducing post-fixation twin pregnancy in mares. Study design: Retrospective clinical study. Methods: Sixteen mares were presented for twin reduction between 51 and 79 days of gestation. History obtained from the owner and/or referring veterinarian detailed information regarding the mare (age, breed), pregnancy (day of gestation, dizygotic versus monozygotic twins, unilateral versus bilateral fixation), treatment and outcome (one live fetus at discharge; live singleton at foaling) after twin reduction. Transrectal fetal thorax compression was performed under ultrasound guidance by two experienced operators. Results: Overall 9 of 16 twin pregnancies were successfully reduced and the likelihood of success was significantly higher in dizygotic than monozygotic twins. The procedure was successful in 9 of 10 dizygotic twins but unsuccessful in all six cases of monozygotic twins. Among the dizygotic twins, two mares lost the pregnancy after discharge from the clinic, seven mares delivered a healthy foal of normal size. Main limitations: Small case number. Conclusions: Transrectal ultrasound-guided fetal thorax compression is a minimally-invasive and successful technique for reducing dizygotic twin pregnancies at approximately 2 months of gestation, but does not lead to any live births in cases of monozygotic twins.

Published
2024

21. Overfeeding Extends the Period of Annual Cyclicity but Increases the Risk of Early Embryonic Death in Shetland Pony Mares

Author

D’fonseca, Nicky M.M., Gibson, Charlotte M.E., Hummel, Iris, van Doorn, David A., Roelfsema, Ellen, Stout, Tom A.E., van den Broek, Jan, de Ruijter-Villani, Marta, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, Equine Internal Medicine, dES AVR, Voortplanting paard, dES/dFAH FR, FAH theoretische epidemiologie, CS_Fertility, CS_Welfare & emerging diseases, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, Equine Internal Medicine, dES AVR, Voortplanting paard, dES/dFAH FR, FAH theoretische epidemiologie, CS_Fertility, and CS_Welfare & emerging diseases

Subjects
endocrine system, obesity, media_common.quotation_subject, animal diseases, biology.animal_breed, Fertility, Embryonic death, Biology, Article, Anestrus, Andrology, Hemorrhagic anovulatory follicle, Shetland pony, anestrus, lcsh:Zoology, medicine, Conceptus, embryonic death, Obesity, lcsh:QL1-991, reproductive and urinary physiology, media_common, Estrous cycle, lcsh:Veterinary medicine, General Veterinary, urogenital system, Incidence (epidemiology), Embryo, Insulin dysregulation, insulin dysregulation, medicine.disease, veterinary(all), Embryo transfer, embryonic structures, lcsh:SF600-1100, Animal Science and Zoology, sense organs, hemorrhagic anovulatory follicle
Abstract

Obesity has been associated with altered reproductive activity in mares, and may negatively affect fertility. To examine the influence of long-term high-energy (HE) feeding on fertility, Shetland pony mares were fed a diet containing 200% of net energy (NE) requirements during a three-year study. The incidence of hemorrhagic anovulatory follicles (HAF) and annual duration of cyclicity were compared to those in control mares receiving a maintenance diet. Day-7 embryos were flushed and transferred between donor and recipient mares from both groups, the resulting conceptuses were collected 21 days after transfer to assess conceptus development. HE mares became obese, and embryos recovered from HE mares were more likely to succumb to early embryonic death. The period of annual cyclicity was extended in HE compared to control mares in all years. The incidence of HAFs did not consistently differ between HE and control mares. No differences in embryo morphometric parameters were apparent. In conclusion, consuming a HE diet extended the duration of cyclicity, and appeared to increase the likelihood of embryos undergoing early embryonic death following embryo transfer.

Published
2021
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22. Effect of long-term overfeeding of a high-energy diet on glucose tolerance in Shetland pony mares

Author

d' Fonseca, Nicky M.M., Gibson, Charlotte M.E., van Doorn, David A., de Ruijter-Villani, Marta, Stout, Tom A.E., Roelfsema, Ellen, Voortplanting paard, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, dES/dFAH FR, Equine Internal Medicine, dES AVR, CS_Fertility, and CS_Welfare & emerging diseases

Subjects
obesity, glucose metabolism, insulin dysregulation, horse
Abstract

Background: Overfeeding is associated with obesity and insulin dysregulation (ID), which are both risk factors for equine metabolic syndrome. How chronic overfeeding affects development of these factors is poorly understood. Objectives: To examine the influence of long-term high-energy diet provision on body condition and ID. Animals: Eleven Shetland pony mares. Methods: In a 3-phase study, the high-energy group (n = 7) was fed 200% of net energy (NE) requirements (hay; concentrate: 36% sugar and starch, 13% fat) for 24 weeks, followed by 17 weeks hay-only feeding before resuming the high-energy diet (n = 4) for an additional 29 weeks. Mares were weighed weekly. Oral glucose tolerance tests were performed 3 to 4 times per dietary period. Results were compared with those of a control group (phase 1, n = 4; phases 2 and 3, n = 6) that received 100% NE requirements, using a general linear mixed model with post hoc Bonferroni testing. Results: The mean body weight of the high-energy group increased by 27% per high-energy feeding period. During both feeding periods, area under the curve (AUC) for plasma glucose concentration decreased (P

Published
2020

23. Overfeeding extends the period of annual cyclicity but increases the risk of early embryonic death in shetland pony mares

Author

LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, Equine Internal Medicine, dES AVR, Voortplanting paard, dES/dFAH FR, FAH theoretische epidemiologie, CS_Fertility, CS_Welfare & emerging diseases, D’fonseca, Nicky M.M., Gibson, Charlotte M.E., Hummel, Iris, van Doorn, David A., Roelfsema, Ellen, Stout, Tom A.E., van den Broek, Jan, de Ruijter-Villani, Marta, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, Equine Internal Medicine, dES AVR, Voortplanting paard, dES/dFAH FR, FAH theoretische epidemiologie, CS_Fertility, CS_Welfare & emerging diseases, D’fonseca, Nicky M.M., Gibson, Charlotte M.E., Hummel, Iris, van Doorn, David A., Roelfsema, Ellen, Stout, Tom A.E., van den Broek, Jan, and de Ruijter-Villani, Marta

Published
2021

25. Contributors

Author

Alvarenga, Marco A., primary, Antczak, Doug. F., additional, Bergfelt, Don R., additional, Card, Claire, additional, Carnevale, Elaine M., additional, Chenier, Tracey S., additional, Gomez, Isabel, additional, Hurtgen, John P., additional, da Cruz Landim-Alvarenga, Fernanda, additional, Love, Charles C., additional, Lyle, Sarah K., additional, Matthews, Phil, additional, McDonnell, Sue M., additional, Meyers, Stuart, additional, Paccamonti, Dale, additional, Parsons, Deborah A., additional, Pinto, Nelson, additional, Pycock, Jonathan F., additional, Riera, Fernando L., additional, Roser, Janet F., additional, Sebastian Rodriguez, Jacobo, additional, Sanchez, Roberto, additional, Sieme, Harald, additional, Sprayberry, Kim A., additional, Steiner, John V., additional, Stout, Tom A.E., additional, Tibary, Ahmed, additional, and Umphenour, Norman W., additional

Published
2009
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29. Effect of long-term overfeeding of a high-energy diet on glucose tolerance in Shetland pony mares

Author

Voortplanting paard, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, dES/dFAH FR, Equine Internal Medicine, dES AVR, CS_Fertility, CS_Welfare & emerging diseases, d' Fonseca, Nicky M.M., Gibson, Charlotte M.E., van Doorn, David A., de Ruijter-Villani, Marta, Stout, Tom A.E., Roelfsema, Ellen, Voortplanting paard, LS Voortplanting Inwendige Ziekten, FAH voeding, dFAH AVR, dES/dFAH FR, Equine Internal Medicine, dES AVR, CS_Fertility, CS_Welfare & emerging diseases, d' Fonseca, Nicky M.M., Gibson, Charlotte M.E., van Doorn, David A., de Ruijter-Villani, Marta, Stout, Tom A.E., and Roelfsema, Ellen

Published
2020

33. Hindquarter Movement of Sporthorse Stallions During Semen Collection

Author

van Beuzekom, Emma L., Hoogendoorn, Arie C., Colenbrander, Ben, Stout, Tom A.E., Back, Willem, Dep Gezondheidszorg Landbouwhuisdieren, dES/dFAH FR, and LS Heelkunde

Subjects
Semen collection, Stallion, Equine, Pelvic flexion, Biomechanics
Abstract

Some stallions used for both breeding and show jumping perform less well in competitions during the breeding season. It has been suggested that the demands of semen collection on the back and pelvis may impair the range of motion (ROM) required for show jumping. To better understand hindquarter dynamics, this study assessed the ROM of the hindquarters during both the mounting phase (MP) and ejaculatory phase (EP) of semen collection and compared it to the ROM previously measured during show jumping. The kinematics of six warmblood stallions were studied during semen collection on a phantom. Skin markers were placed on the withers, tuber coxae, proximal femur and tibia, and distal tibia and metatarsus. During each phase, six angles were measured using recordings made with a home-video camera (60 Hz) positioned perpendicular to the phantom. The differences in joint angles between the two phases were compared statistically using commercially available software. The pelvis showed a significantly larger ROM during the MP than the EP (P

Published
2017

35. Potential Health and Environmental Risks of Three-Dimensional Engineered Polymers

Author

De Almeida Monteiro Melo Ferraz, Marcia, Henning, Heiko H.W., Da Costa, Pedro Ferreira, Malda, Jos, Le Gac, Séverine, Bray, Fabrice, Van Duursen, Majorie B.M., Brouwers, Jos F., Van De Lest, Chris H.A., Bertijn, Ingeborg, Kraneburg, Lisa, Vos, Peter L.A.M., Stout, Tom A.E., Gadella, Barend M., De Almeida Monteiro Melo Ferraz, Marcia, Henning, Heiko H.W., Da Costa, Pedro Ferreira, Malda, Jos, Le Gac, Séverine, Bray, Fabrice, Van Duursen, Majorie B.M., Brouwers, Jos F., Van De Lest, Chris H.A., Bertijn, Ingeborg, Kraneburg, Lisa, Vos, Peter L.A.M., Stout, Tom A.E., and Gadella, Barend M.

Published
2018

36. Potential Health and Environmental Risks of Three-Dimensional Engineered Polymers

Author

Orthopaedie Onderzoek, Regenerative Medicine and Stem Cells, De Almeida Monteiro Melo Ferraz, Marcia, Henning, Heiko H.W., Da Costa, Pedro Ferreira, Malda, Jos, Le Gac, Séverine, Bray, Fabrice, Van Duursen, Majorie B.M., Brouwers, Jos F., Van De Lest, Chris H.A., Bertijn, Ingeborg, Kraneburg, Lisa, Vos, Peter L.A.M., Stout, Tom A.E., Gadella, Barend M., Orthopaedie Onderzoek, Regenerative Medicine and Stem Cells, De Almeida Monteiro Melo Ferraz, Marcia, Henning, Heiko H.W., Da Costa, Pedro Ferreira, Malda, Jos, Le Gac, Séverine, Bray, Fabrice, Van Duursen, Majorie B.M., Brouwers, Jos F., Van De Lest, Chris H.A., Bertijn, Ingeborg, Kraneburg, Lisa, Vos, Peter L.A.M., Stout, Tom A.E., and Gadella, Barend M.

Published
2018

39. Improved bovine embryo production in an oviduct-on-a-chip system : prevention of poly-spermic fertilization and parthenogenic activation

Author

Ferraz, Marcia A.M.M., Henning, Heiko H.W., Costa, Pedro F., Malda, Jos, Melchels, Ferry P.W., Wubbolts, Richard, Stout, Tom A.E., Vos, Peter L.A.M., Gadella, Bart M., Ferraz, Marcia A.M.M., Henning, Heiko H.W., Costa, Pedro F., Malda, Jos, Melchels, Ferry P.W., Wubbolts, Richard, Stout, Tom A.E., Vos, Peter L.A.M., and Gadella, Bart M.

Published
2017

40. Decision Making for Cryptorchid Castration; a Retrospective Analysis of 280 Cases

Author

LS Heelkunde, LS Klinische Reproductie, LS Voortplanting Inwendige Ziekten, dES AVR, dES/dFAH FR, Huppes, Tsjester, Stout, Tom A.E., Ensink, Jos M., LS Heelkunde, LS Klinische Reproductie, LS Voortplanting Inwendige Ziekten, dES AVR, dES/dFAH FR, Huppes, Tsjester, Stout, Tom A.E., and Ensink, Jos M.

Published
2017

41. Hindquarter Movement of Sporthorse Stallions During Semen Collection

Author

Dep Gezondheidszorg Landbouwhuisdieren, dES/dFAH FR, LS Heelkunde, van Beuzekom, Emma L., Hoogendoorn, Arie C., Colenbrander, Ben, Stout, Tom A.E., Back, Willem, Dep Gezondheidszorg Landbouwhuisdieren, dES/dFAH FR, LS Heelkunde, van Beuzekom, Emma L., Hoogendoorn, Arie C., Colenbrander, Ben, Stout, Tom A.E., and Back, Willem

Published
2017

43. Improved bovine embryo production in an oviduct-on-a-chip system: prevention of poly-spermic fertilization and parthenogenic activation

Author

Orthopaedie Onderzoek, Regenerative Medicine and Stem Cells, Ferraz, Marcia A.M.M., Henning, Heiko H.W., Costa, Pedro F., Malda, Jos, Melchels, Ferry P.W., Wubbolts, Richard, Stout, Tom A.E., Vos, Peter L.A.M., Gadella, Bart M., Orthopaedie Onderzoek, Regenerative Medicine and Stem Cells, Ferraz, Marcia A.M.M., Henning, Heiko H.W., Costa, Pedro F., Malda, Jos, Melchels, Ferry P.W., Wubbolts, Richard, Stout, Tom A.E., Vos, Peter L.A.M., and Gadella, Bart M.

Published
2017

44. The Role of Oviductal Cells in Activating Stallion Spermatozoa

Author

Leemans, Bart, Gadella, Bart M., Stout, Tom A.E., De Schauwer, Catharina, Nelis, Hilde, Hoogewijs, Maarten, Van Soom, Ann, Leemans, Bart, Gadella, Bart M., Stout, Tom A.E., De Schauwer, Catharina, Nelis, Hilde, Hoogewijs, Maarten, and Van Soom, Ann

Published
2016

47. Procaine Induces Cytokinesis in Horse Oocytes via a pH-Dependent Mechanism1

Author

Leemans, Bart, primary, Gadella, Bart M., additional, Stout, Tom A.E., additional, Heras, Sonia, additional, Smits, Katrien, additional, Ferrer-Buitrago, Minerva, additional, Claes, Eline, additional, Heindryckx, Björn, additional, De Vos, Winnok H., additional, Nelis, Hilde, additional, Hoogewijs, Maarten, additional, and Van Soom, Ann, additional

Published
2015
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