LÓpez-Gatius Fernando, Garcia-Ispierto Irina
Transfer in Bovine Reproduction SLu, 22300 Barbastro, Spain.
Agrotecnio Centre; University of Lleida, 25198 Lleida, Spain.
J Reprod Dev. 2020 Aug 20;66(4):287-289. doi: 10.1262/jrd.2020-014. Epub 2020 Apr 7.
In this study, we present two proposed approaches to prevent twin pregnancies in dairy cattle: 1) single, in vitro-produced embryonic transfer into a recipient cow or 2) subordinate follicle drainage at the time of insemination. Both procedures lead to improved embryonic survival. As the use of sexed semen generates herd replacements and additional heifers, we propose the transfer of a single female cattle embryo into cows that are not suitable for producing replacements, and follicular drainage in lactating cows with genetic merit. This should eliminate economic losses associated with twin pregnancies and increase cattle output of the herd.
在本研究中，我们提出了两种预防奶牛双胎妊娠的方法：1）将单个体外生产的胚胎移植到受体母牛体内；2）在授精时对从属卵泡进行引流。这两种方法都能提高胚胎存活率。由于使用性别分选精液会产生畜群替代牛和额外的小母牛，我们建议将单个雌性牛胚胎移植到不适合生产替代牛的母牛体内，并对具有遗传优势的泌乳母牛进行卵泡引流。这应该能消除与双胎妊娠相关的经济损失，并提高畜群的牛产量。
