两种FTAI的荷尔蒙方案对重复母牛生育能力的影响
Luis Miguel Vargas Ortiz1, Verónica Cristina Andrade Yucailla2, Juan Ramón García Díaz3,4
1Facultad de Ciencias Agropecuarias, Universidad Técnica de Ambato, Sector el Tambo-La Universidad, Vía a Quero, Cevallos 1801334, Ecuador.
International journal of molecular sciences
|June 26, 2025
概括
将雌二醇酸添加到常规的激素治疗方案中,改善了乳牛重复繁殖综合征 (RCS) 的生育能力. 这增强了主导卵泡大小,激素水平 (雌激素,LH,P4) 和第一个固定时间人工授精 (FTAI) 的怀孕率.
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:
- 乳牛的重复繁殖者综合征 (RCS) 对群体的生育能力和经济效率产生负面影响.
- 了解荷尔蒙对卵泡动态的影响对于改善受影响动物人工授精成功率至关重要.
研究的目的:
- 为了评估两个激素协议的有效性,固定时间人工授精 (FTAI) 在霍尔施泰因被诊断患有RCS.
- 为了比较常规协议和J-Synch协议之间的毛囊动力学,激素概况和生育结果.
主要方法:
- 两组RCS Holstein奶牛 (G1:传统,G2:J-Synch) 接受了妇科检查和血液血清激素分析.
- 用统计测试测量和比较毛囊直径,FSH,LH和P4度.
- 分析了雌激素发生率和怀孕率,并通过逻辑回归确定了影响怀孕的因素.
主要成果:
- 常规方案 (G1) 在植入后的第7天显示左卵巢的主导卵泡直径更大.
- 在FTAI时的雌激素和LH度,FTAI后15天的P4度和整体怀孕率在G1显著更高 (p <0.05).
- 后勤回归确定了雌激素,LH,P4度,以及在FTAI缺少雌激素作为影响怀孕的重要因素 (p <0.05).
结论:
- 在常规的激素治疗方案中加入雌二醇酸增加了主导卵泡直径,改善了雌二醇,LH和P4度.
- 这一协议导致乳牛在第一次FTAI期间经历重复繁殖综合征的怀孕率更高.
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