基于孕激素的排卵同步协议延长时间对日本黑牛生育能力的影响
Kazuhiro Bandai1, Ena Chiba2, Toru Ogata2
1Faculty of Veterinary Science, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan.
Animal science journal = Nihon chikusan Gakkaiho
|January 21, 2026
概括
在排卵同步协议中延长阴道内孕激素释放装置 (CIDR) 治疗时间并没有影响日本黑牛的受孕率. 对于长期扩展的CIDR组,建议在雌激素检测后进行AI,以改善妊娠结果.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 动物繁殖 动物繁殖
- 内分泌学 在内分泌学.
背景情况:
- 排卵同步协议对于牛的高效繁殖至关重要.
- 阴道内孕激素释放装置 (CIDR) 通常用于管理雌激素周期.
- 优化CIDR治疗时间对于最大限度地提高受孕率至关重要.
研究的目的:
- 为了比较日本黑牛的受孕率,使用基于CIDR的排卵同步与不同的治疗持续时间.
- 评估延长CIDR治疗对雌性表达和人工授精 (AI) 妊娠的影响.
主要方法:
- 三组日本黑牛接受了不同时间的CIDR治疗:Ovsynch (7天),短时间 (8-10天) 和长时间 (11-14天).
- 所有组在CIDR插入时都接受了GnRH,在CIDR撤出时接受了PGF2α.
- 人工授精 (AI) 是基于雌激素检测或定时AI进行的.
主要成果:
- 与Ovsynch组相比,长时间扩展的组显示出更高的雌性表达倾向 (13.4%对0.0%).
- 每个AI的怀孕在所有组中都是相似的:Ovsynch (47.5%),短延长 (47.6%) 和长延长 (50.7%).
结论:
- 延长CIDR治疗时间不会显著改变日本黑牛的受孕率.
- 对于长期扩展的CIDR组中的奶牛,建议以雌激素检测为指导的AI来潜在地提高怀孕结果.
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