Ultrasonography of the conceptus development from days 15 to 60 of pregnancy in non-cyclic recipient mares

Ciência Rural

Pantoja, José Carlos de Figueiredo¹  Silva, Elisa Sant'Anna Monteiro da²  Meira, Cezinande²  Puoli, José Nicolau Próspero¹ 

[1] UNESP, Botucatu, Brazil;Universidade Estadual Paulista, Botucatu, Brazil

关键词: altrenogest;    non-cyclic recipient mares;    embryonic vesicle;    embryo proper;    fetus;   

DOI  :  10.1590/0103-8478cr20140517

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

The present study evaluated the development of equine conceptus transferred to non-cyclic recipient mares treated with altrenogest. Twenty four mares were used as embryo recipients during the ovulatory phase (Control group; n=8) or anestrus/transitional phases (Altrenogest group; n=16) and were evaluated by transrectal ultrasonography, at five day intervals, to monitor the development of embryonic vesicles from 15 to 45 days of pregnancy and embryo proper/fetus from 20 to 60 days. Embryonic vesicle's features such as shape, embryo location within the vesicle and umbilical cord development were similar between cyclic and non-cyclic recipient mares. The embryonic vesicle and embryo proper/fetus growth was significant (P<0.05) between 15 and 60 days of gestation in Altrenogest and Control groups, except for days 20 to 30, where embryonic vesicle growth decrease was observed (P>0.05). The embryonic vesicle and embryo proper/fetus growth was similar (P>0.05) when gestational days were compared between groups. The similarity in conceptus growth between cyclic and non-cyclic recipient mares during early pregnancy indicates that the uterine environment of non-cyclic recipient mares treated with progestins provides similar conditions for the development of transferred embryos

【 授权许可】

Unknown