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.

中文翻译：

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转移单个胚胎与排出次级卵泡以防止奶牛双胞胎妊娠。为什么不同时？

在这项研究中，我们提出了两种预防奶牛双胞胎妊娠的建议方法：1) 将单个体外产生的胚胎移植到受体奶牛中或 2) 在授精时进行次级卵泡引流。这两种程序都可以提高胚胎存活率。由于使用性交精液会产生牛群替代品和额外的小母牛，我们建议将单个雌性牛胚胎移植到不适合生产替代品的奶牛中，并在具有遗传价值的泌乳奶牛中进行卵泡排出。这将消除与双胎妊娠相关的经济损失并增加牛群的牛产量。