Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season

Background: Proper timing for embryo collection and transfer in horses -which is critical for the success of this biotechnology- is still debated. Additionally, there is little information on this technology under tropical conditions. Objective: To determine the best day for collection and transfer...

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Autores principales:	José C. Ferreira-Silva, Felipe A. B. M. Sales, Pábola S. Nascimento, Marcelo T. Moura, Leopoldo M. Freitas Neto, Jorge M. Rocha, Heder N. Ferreira, Marcos A. L. Oliveira
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2019
Materias:	assisted reproduction embryo embryo collection embryo recipients embryo transfer equus caballus estrous synchronization mangalarga marchador mare Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/71de0a1e5fe744e7bf6255c87c1f20fa
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spelling	oai:doaj.org-article:71de0a1e5fe744e7bf6255c87c1f20fa2021-12-01T18:49:31ZEvaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season2256-295810.17533/udea.rccp.v32n3a06https://doaj.org/article/71de0a1e5fe744e7bf6255c87c1f20fa2019-07-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/336768https://doaj.org/toc/2256-2958Background: Proper timing for embryo collection and transfer in horses -which is critical for the success of this biotechnology- is still debated. Additionally, there is little information on this technology under tropical conditions. Objective: To determine the best day for collection and transfer of embryos in Mangalarga Marchador mares under Brazilian northeast’s conditions. Methods: Donors (n= 30) and recipients (n= 76) in diestrus phase were selected based on both clinical and gynecology examinations. Estrus was induced on both donor and recipient mares by intramuscular injection of 5 mg Dinoprost, aiming to obtain an ovulation interval of -1 to +3 between recipient and donor. Ovulation was induced with buserelin acetate when the largest follicle reached at least 35 mm in diameter. At this time, mares were subjected to artificial insemination at 48-hour intervals until ovulation. The embryos were collected on days 7, 8, and 9 after ovulation. Results: The embryo collection on day 8 was more efficient (p<0.05) than on day 7, but it was not more effective (p>0.05) than day 9, which presented the same efficiency (p>0.05) as day 7. From a total of 76 embryos transferred to the recipients, that were between days 4 and 9 after ovulation, there was no influence (p>0.05) of the day of transfer on pregnancy rate. Conclusions: The embryo collection must be performed on day 8 after ovulation, and transfer can be performed on any day of that interval (4-9) without affecting the pregnancy rate.José C. Ferreira-SilvaFelipe A. B. M. SalesPábola S. NascimentoMarcelo T. MouraLeopoldo M. Freitas NetoJorge M. RochaHeder N. FerreiraMarcos A. L. OliveiraUniversidad de Antioquiaarticleassisted reproductionembryoembryo collectionembryo recipientsembryo transferequus caballusestrous synchronizationmangalarga marchadormareAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 32, Iss 3, Pp 214-220 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	assisted reproduction embryo embryo collection embryo recipients embryo transfer equus caballus estrous synchronization mangalarga marchador mare Animal culture SF1-1100
spellingShingle	assisted reproduction embryo embryo collection embryo recipients embryo transfer equus caballus estrous synchronization mangalarga marchador mare Animal culture SF1-1100 José C. Ferreira-Silva Felipe A. B. M. Sales Pábola S. Nascimento Marcelo T. Moura Leopoldo M. Freitas Neto Jorge M. Rocha Heder N. Ferreira Marcos A. L. Oliveira Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
description	Background: Proper timing for embryo collection and transfer in horses -which is critical for the success of this biotechnology- is still debated. Additionally, there is little information on this technology under tropical conditions. Objective: To determine the best day for collection and transfer of embryos in Mangalarga Marchador mares under Brazilian northeast’s conditions. Methods: Donors (n= 30) and recipients (n= 76) in diestrus phase were selected based on both clinical and gynecology examinations. Estrus was induced on both donor and recipient mares by intramuscular injection of 5 mg Dinoprost, aiming to obtain an ovulation interval of -1 to +3 between recipient and donor. Ovulation was induced with buserelin acetate when the largest follicle reached at least 35 mm in diameter. At this time, mares were subjected to artificial insemination at 48-hour intervals until ovulation. The embryos were collected on days 7, 8, and 9 after ovulation. Results: The embryo collection on day 8 was more efficient (p<0.05) than on day 7, but it was not more effective (p>0.05) than day 9, which presented the same efficiency (p>0.05) as day 7. From a total of 76 embryos transferred to the recipients, that were between days 4 and 9 after ovulation, there was no influence (p>0.05) of the day of transfer on pregnancy rate. Conclusions: The embryo collection must be performed on day 8 after ovulation, and transfer can be performed on any day of that interval (4-9) without affecting the pregnancy rate.
format	article
author	José C. Ferreira-Silva Felipe A. B. M. Sales Pábola S. Nascimento Marcelo T. Moura Leopoldo M. Freitas Neto Jorge M. Rocha Heder N. Ferreira Marcos A. L. Oliveira
author_facet	José C. Ferreira-Silva Felipe A. B. M. Sales Pábola S. Nascimento Marcelo T. Moura Leopoldo M. Freitas Neto Jorge M. Rocha Heder N. Ferreira Marcos A. L. Oliveira
author_sort	José C. Ferreira-Silva
title	Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
title_short	Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
title_full	Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
title_fullStr	Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
title_full_unstemmed	Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season
title_sort	evaluation of embryo collection and transfer days on pregnancy rate of mangalarga marchador mares during the breeding season
publisher	Universidad de Antioquia
publishDate	2019
url	https://doaj.org/article/71de0a1e5fe744e7bf6255c87c1f20fa
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Evaluation of embryo collection and transfer days on pregnancy rate of Mangalarga Marchador mares during the breeding season

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