Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer?
Abstract Estradiol cypionate (EC) or GnRH have been widely used for ovulation induction in timed embryo transfer (TET). EC administration increases the proportion of cows that show estrus, whereas GnRH promotes more synchronized ovulations. The aim of the present study was to evaluate the potential beneficial effects of combining EC and GnRH in TET. In experiment 1, no difference was observed on serum progesterone concentrations on Day 6 and 13 after GnRH treatment between GnRH and EC+GnRH groups. In experiment 2, pregnancy per embryo transfer (P/ET) did not differ (p = 0.69) between GnRH (62.8%) and EC+GnRH (58.7%) groups. In conclusion, combining EC and GnRH for ovulation induction does not increase progesterone secretion and pregnancy rate after TET in cattle.
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Colégio Brasileiro de Reprodução Animal
2022
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oai:scielo:S1984-314320220003005012022-10-13Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer?Lima,Wagner MarquesMoraes,Fabiane Pereira deFerreira,RogérioMondadori,Rafael GianellaVieira,Arnaldo DinizKnabah,Nathália WacholzLima,Danylo Cintra MedeirosRovani,Monique TomazelePfeifer,Luiz Francisco MachadoGonçalves,Paulo Bayard DiasGasperin,Bernardo Garziera gestation luteal function progesterone synchronization Abstract Estradiol cypionate (EC) or GnRH have been widely used for ovulation induction in timed embryo transfer (TET). EC administration increases the proportion of cows that show estrus, whereas GnRH promotes more synchronized ovulations. The aim of the present study was to evaluate the potential beneficial effects of combining EC and GnRH in TET. In experiment 1, no difference was observed on serum progesterone concentrations on Day 6 and 13 after GnRH treatment between GnRH and EC+GnRH groups. In experiment 2, pregnancy per embryo transfer (P/ET) did not differ (p = 0.69) between GnRH (62.8%) and EC+GnRH (58.7%) groups. In conclusion, combining EC and GnRH for ovulation induction does not increase progesterone secretion and pregnancy rate after TET in cattle.info:eu-repo/semantics/openAccessColégio Brasileiro de Reprodução AnimalAnimal Reproduction v.19 n.3 20222022-01-01info:eu-repo/semantics/othertext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-31432022000300501en10.1590/1984-3143-ar2022-0067 |
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Lima,Wagner Marques Moraes,Fabiane Pereira de Ferreira,Rogério Mondadori,Rafael Gianella Vieira,Arnaldo Diniz Knabah,Nathália Wacholz Lima,Danylo Cintra Medeiros Rovani,Monique Tomazele Pfeifer,Luiz Francisco Machado Gonçalves,Paulo Bayard Dias Gasperin,Bernardo Garziera |
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Lima,Wagner Marques Moraes,Fabiane Pereira de Ferreira,Rogério Mondadori,Rafael Gianella Vieira,Arnaldo Diniz Knabah,Nathália Wacholz Lima,Danylo Cintra Medeiros Rovani,Monique Tomazele Pfeifer,Luiz Francisco Machado Gonçalves,Paulo Bayard Dias Gasperin,Bernardo Garziera Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
author_facet |
Lima,Wagner Marques Moraes,Fabiane Pereira de Ferreira,Rogério Mondadori,Rafael Gianella Vieira,Arnaldo Diniz Knabah,Nathália Wacholz Lima,Danylo Cintra Medeiros Rovani,Monique Tomazele Pfeifer,Luiz Francisco Machado Gonçalves,Paulo Bayard Dias Gasperin,Bernardo Garziera |
author_sort |
Lima,Wagner Marques |
title |
Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
title_short |
Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
title_full |
Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
title_fullStr |
Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
title_full_unstemmed |
Does combining estradiol cypionate and GnRH for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
title_sort |
does combining estradiol cypionate and gnrh for ovulation induction in recipient cows increase pregnancy rate after timed embryo transfer? |
description |
Abstract Estradiol cypionate (EC) or GnRH have been widely used for ovulation induction in timed embryo transfer (TET). EC administration increases the proportion of cows that show estrus, whereas GnRH promotes more synchronized ovulations. The aim of the present study was to evaluate the potential beneficial effects of combining EC and GnRH in TET. In experiment 1, no difference was observed on serum progesterone concentrations on Day 6 and 13 after GnRH treatment between GnRH and EC+GnRH groups. In experiment 2, pregnancy per embryo transfer (P/ET) did not differ (p = 0.69) between GnRH (62.8%) and EC+GnRH (58.7%) groups. In conclusion, combining EC and GnRH for ovulation induction does not increase progesterone secretion and pregnancy rate after TET in cattle. |
publisher |
Colégio Brasileiro de Reprodução Animal |
publishDate |
2022 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-31432022000300501 |
work_keys_str_mv |
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