作者
Jeferson F Fonseca, Maria Emilia F Oliveira, Felipe Z Brandão, Ribrio ITP Batista, Alexandre R Garcia, Pawel M Bartlewski, Joanna MG Souza-Fabjan
发表日期
2019/1/21
期刊
Reproduction, Fertility and Development
卷号
31
期号
1
页码范围
17-26
出版商
Csiro Publishing
简介
Brazil has presented tremendous progress in non-surgical embryo transfer (NSET) in sheep and goats. New instruments and techniques for non-surgical embryo recovery (NSER) and NSET in small ruminants were implemented. Recent improvements include refinement of the protocols for cervical relaxation combining oestradiol–oxytocin–cloprostenol treatment at specific times before NSER in sheep; recipient goats do not require any hormonal drugs to induce cervical dilation and direct embryo transfer by the cervical route yields excellent results. Transrectal ovarian ultrasonography (B-mode but especially colour Doppler) have proven to be accurate methods to localise and enumerate corpora lutea and luteinised unovulated follicles in recipient and donor does and ewes. An array of new criteria for selecting superior animals for NSER and NSET (e.g. cervical mapping) have been developed by Brazilian …
引用总数
20192020202120222023202431677103
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JF Fonseca, MEF Oliveira, FZ Brandão, RITP Batista… - Reproduction, Fertility and Development, 2019