一种新的方法来同步乳牛母牛的排卵,用于第二次和随后的授精

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Updated: Sep 14, 2025

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

Published on: July 8, 2020

S Chatzieffraimidis¹, G Tsousis¹, E Kiossis¹

¹Clinic of Farm Animals, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece 54627.

Journal of dairy science

|July 20, 2025

概括

这项研究发现,使用卵巢检查的新型重同步策略与标准协议相比,不会影响奶牛母牛的怀孕率. 然而,新的策略减少了释放孕激素的阴道内装置和激素治疗的使用,降低了成本.

科学领域:

生殖内分泌学生殖内分泌学
乳牛养殖管理乳牛养殖管理
人工授精技术的人工授精技术

背景情况:

通过人工授精 (AI) 改善怀孕对于奶牛群的效率至关重要.
目前的重同步协议通常涉及激素治疗和设备,而不考虑卵巢状态.
评估新的策略可以优化生殖结果并降低成本.

研究的目的:

为了比较一种新型超声导向重同步策略与标准的6天Cosynch协议对非怀孕乳牛母牛的怀孕率的有效性.
评估新战略对使用荷尔蒙治疗和相关成本的影响.

主要方法:

非怀孕的母乳母牛 (n=851) 被分配到盲目重同步组 (BL) 或超声检查组 (US).
美国小组接受了修改后的Short Resynch协议或基于卵巢结构的6天Cosynch + PRID协议.
每个AI的怀孕是在AI后32±3天被诊断出来的,在一组小母牛中测量了孕激素水平.

主要成果:

每个AI的怀孕在BL组 (50.2%) 和美国组 (52.6%) 之间没有显著差异.
在BL (50.2%),US-PRID (49%) 和US-Short (55.6%) 组之间没有观察到每AI的怀孕显著差异.
与BL组相比,美国的策略将孕激素释放性阴道内装置的使用量减少了51%和激素治疗的使用量减少了12.75%.

结论:

超声指导的重同步策略有效地实现了与乳牛母牛标准协议相似的怀孕率.
这种方法显著减少了对孕激素释放性阴道内装置和激素干预的需求,从而降低了同步成本.
在重同步协议中实施卵巢检查为乳牛繁殖提供了具有成本效益的替代方案.

关键词:

奶牛牛犊牛奶牛牛犊牛牛卵巢结构卵巢结构重新同步重新同步的时间.时间定制的AI.

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