Baruselli Pietro Sampaio, de Souza Alexandre Henryli, de Sá Manoel Francisco, Marques Marcio Oliveira, Sales Jose Né Lio de Sousa
Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil.
Ceva Animal Health, Paulínia-SP, Brazil.
Anim Reprod. 2018 Aug 17;15(3):247-255. doi: 10.21451/1984-3143-AR2018-0091.
A number of reproductive biotechnologies are currently available to multiply offspring from high genetic merit animals to enhance reproductive efficiency and profitability both in dairy and beef herds. Some of these technologies such as fixed time artificial insemination (FTAI), when correctly implemented, generally allow greater reproductive performance than natural breeding. Besides the use of frozen-thawed semen during artificial insemination, cattle recipients can also be synchronized to receive embryos (produced or ) at set dates with fertility results that usually outperforms natural breeding as well as artificial insemination (AI), particularly during warm seasons and in repeat breeders cows. Altogether, the use of hormonal programs to synchronize ovulation time simplify field routine, can easily fix physiological limitations related to postpartum anestrus (beef cows), poor estrus detection efficiency due to less evident estrus signs (dairy cows), making AI and ET viable to commercial herds both in terms of results and economical returns.
目前有多种生殖生物技术可用于繁育具有高遗传价值动物的后代，以提高奶牛和肉牛群的繁殖效率和盈利能力。其中一些技术，如定时人工授精（FTAI），如果实施得当，通常比自然繁殖具有更高的繁殖性能。除了在人工授精过程中使用冻融精液外，母牛受体还可以通过同期发情处理，在设定日期接受胚胎（生产的或），其繁殖结果通常优于自然繁殖以及人工授精（AI），尤其是在温暖季节和屡配不孕的母牛中。总之，使用激素程序来同步排卵时间简化了田间操作流程，能够轻松解决与产后发情（肉牛母牛）相关的生理限制、因发情迹象不明显导致的发情检测效率低下（奶牛）等问题，使得人工授精和胚胎移植在商业畜群中在繁殖结果和经济回报方面都具有可行性。
