Embryo transfer in no cycling Crioula and Quarter horse breeds treated with estradiol cipionate and long-acting progesterone

Brazilian Archives of Biology and Technology

Fernanda Kaercher²  Marlon Siqueira¹  Alessandro Mercadante¹  Tatiana Figueiredo²  Romildo Romualdo Weiss¹  Felipe Siqueira¹  Luiz Ernandes Kozicki² 

[1] ,Pontifícia Universidade Católica do Paraná Programa de Mestrado em Ciência Animal São José dos Pinhais PR ,Brasil

关键词: Embryo transfer;    Cycling and no cycling mares;    Long acting progesterone;    Estradiol cipionate;    Mares recipient;   

DOI  :  10.1590/S1516-89132011000600009

来源: SciELO

【 摘 要 】

The aim of this work was to prepare the mares for embryo transfer. In group 1 (G1,treated, n=15), recipient mares in anoestrus or in a transition period were treated with 5.0, 3.0 and 2.0 mg of estradiol cipionate at the days 0, 1 and 2 respectively, beginning at the day of ovulation (DO). From the fourth day on, the mares this group received long-acting progesterone weekly, up to the 120 day of gestation. At D8, the embryo was collected from the donor and transferred to the recipient. At D12, the ultrasonographyc diagnosis of pregnancy was carried out. The control group (G2, not treated, n=20) was formed by cycling recipient mares, displaying ovulation at each 2 to 3 days after the donors mare ovulation. The pregnancy rate was higher (p<0.05) in the mares from G2 (85.0%) than from G1 (53.3%). Thus, it could be concluded that the treated mares although showed lesser pregnancy rate than the cycling mare, were satisfactory alternative to be used mainly when there is no available cycling recipient.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License