Use of long-acting progesterone to acyclic embryo recipient mares
The objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP® - Pfizer Saúde Animal, São Paulo, Brazil), followed by 1...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zootecnia
2012-03-01
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| Series: | Revista Brasileira de Zootecnia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300019 |
| _version_ | 1819118137502597120 |
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| author | Gabriel Maksoud Greco Fábio Luis Gonçalves Burlamaqui Aline Emerim Pinna Fernando José Rohen de Queiroz Maria Pia dos Santos Cunha Felipe Zandonadi Brandão |
| author_facet | Gabriel Maksoud Greco Fábio Luis Gonçalves Burlamaqui Aline Emerim Pinna Fernando José Rohen de Queiroz Maria Pia dos Santos Cunha Felipe Zandonadi Brandão |
| author_sort | Gabriel Maksoud Greco |
| collection | DOAJ |
| description | The objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP® - Pfizer Saúde Animal, São Paulo, Brazil), followed by 1500 mg of a sustained-release progesterone injection (P4LA150® - Laboratórios B.E.T., Rio de Janeiro, Brazil). Out of all 1506 embryo recovery attempts performed, 59.36% were positive (894/1506). Pregnancy rates of cyclic and acyclic mares were, respectively, 44.12% (319/723) and 57.68% (139/241) - higher in acyclic recipients under progesterone treatment. Embryo loss was similar between groups (9.72% 31/319 vs. 11.51% - 16/139). When fertility data on acyclic mares treated with long-action progesterone were grouped in relation to the interval of the beginning of the treatment with progesterone to the embryo transfer, there was no difference in pregnancy rates at 12 days (51.28% - 20/39; 58.92% - 33/56; 60.52% - 46/76 and 58.57% - 41/70 for embryos transferred 3 (P3), 4 (P4), 5 (P5) and 6 (P6) days after the beginning of the treatment with progesterone). Groups P3, P4, P5 and P6 showed embryo loss rates of 20.00% (4/20), 12.12% (4/33), 2.17% (1/46) and 17.07% (7/41), respectively. These rates were similar in groups P3, P4 and P6. Pregnant recipients submitted to an embryo transferring procedure on P5 showed lower embryo mortality rates than on P3 and P6. P4 recipients tended to suffer higher embryo mortality rates than P5. Acyclic recipient mares under progesterone treatment can be satisfactoryly used in embryo transfer programs. |
| first_indexed | 2024-12-22T05:44:06Z |
| format | Article |
| id | doaj.art-b519d09cd2504139a15b0d227d2b53f9 |
| institution | Directory Open Access Journal |
| issn | 1516-3598 1806-9290 |
| language | English |
| last_indexed | 2024-12-22T05:44:06Z |
| publishDate | 2012-03-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-b519d09cd2504139a15b0d227d2b53f92022-12-21T18:37:06ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902012-03-0141360761110.1590/S1516-35982012000300019Use of long-acting progesterone to acyclic embryo recipient maresGabriel Maksoud GrecoFábio Luis Gonçalves BurlamaquiAline Emerim PinnaFernando José Rohen de QueirozMaria Pia dos Santos CunhaFelipe Zandonadi BrandãoThe objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP® - Pfizer Saúde Animal, São Paulo, Brazil), followed by 1500 mg of a sustained-release progesterone injection (P4LA150® - Laboratórios B.E.T., Rio de Janeiro, Brazil). Out of all 1506 embryo recovery attempts performed, 59.36% were positive (894/1506). Pregnancy rates of cyclic and acyclic mares were, respectively, 44.12% (319/723) and 57.68% (139/241) - higher in acyclic recipients under progesterone treatment. Embryo loss was similar between groups (9.72% 31/319 vs. 11.51% - 16/139). When fertility data on acyclic mares treated with long-action progesterone were grouped in relation to the interval of the beginning of the treatment with progesterone to the embryo transfer, there was no difference in pregnancy rates at 12 days (51.28% - 20/39; 58.92% - 33/56; 60.52% - 46/76 and 58.57% - 41/70 for embryos transferred 3 (P3), 4 (P4), 5 (P5) and 6 (P6) days after the beginning of the treatment with progesterone). Groups P3, P4, P5 and P6 showed embryo loss rates of 20.00% (4/20), 12.12% (4/33), 2.17% (1/46) and 17.07% (7/41), respectively. These rates were similar in groups P3, P4 and P6. Pregnant recipients submitted to an embryo transferring procedure on P5 showed lower embryo mortality rates than on P3 and P6. P4 recipients tended to suffer higher embryo mortality rates than P5. Acyclic recipient mares under progesterone treatment can be satisfactoryly used in embryo transfer programs.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300019embryo lossembryo transfermarepregnancy |
| spellingShingle | Gabriel Maksoud Greco Fábio Luis Gonçalves Burlamaqui Aline Emerim Pinna Fernando José Rohen de Queiroz Maria Pia dos Santos Cunha Felipe Zandonadi Brandão Use of long-acting progesterone to acyclic embryo recipient mares Revista Brasileira de Zootecnia embryo loss embryo transfer mare pregnancy |
| title | Use of long-acting progesterone to acyclic embryo recipient mares |
| title_full | Use of long-acting progesterone to acyclic embryo recipient mares |
| title_fullStr | Use of long-acting progesterone to acyclic embryo recipient mares |
| title_full_unstemmed | Use of long-acting progesterone to acyclic embryo recipient mares |
| title_short | Use of long-acting progesterone to acyclic embryo recipient mares |
| title_sort | use of long acting progesterone to acyclic embryo recipient mares |
| topic | embryo loss embryo transfer mare pregnancy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300019 |
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