多次交配增强了白色体的产生,增加了白色体 perfusion 区域和雌羊的孕激素生产
J P Bottino1, M G K Rodriguez1, M Ratto2
1Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de la República, Ruta 8 km 18, Montevideo 1300, Uruguay.
Animal reproduction science
|November 21, 2024
概括
雌羊的多次交配延长了雌性期,并增加了排卵卵泡的大小. 这导致色体 (CL) 发育,血液 perfusion 和孕激素分泌的增强,改善生殖功能.
科学领域:
- 生殖生物学 生殖生物学
- 动物科学动物科学
- 兽医医学 兽医医学 兽医医学
背景情况:
- 众所周知,母羊的多次交配可以减少雌性期的长度,并在排卵前激增期间增加黄素化激素 (LH) 的分泌.
- 了解交配频率对黄体 (CL) 发育和功能的影响,对于绵羊的繁殖效率至关重要.
研究的目的:
- 为了调查多次交配是否能增强羊的白色体 (CL) 发育和功能.
- 为了确定重复交配对雌性期持续时间,排卵卵泡大小,CL输液和孕激素产生的影响.
主要方法:
- 具有同步性雌性周期的20只母羊被分为两个组:一个配对组 (n=10) 和一个控制组 (n=10).
- 交配组每3小时进行一次交配,直到雌激期结束,而对照组没有交配.
- 通过直肠超声波 (B模式和颜色多普勒) 和血清孕激素分析用于评估CL的存在,大小,血液输液和激素水平.
主要成果:
- 与对照组相比,交配的母羊表现出明显更长的期 (37.2 ± 2.7 小时 vs 26.4 ± 2.7 小时) 和更大的排卵卵卵泡 (5.97 ± 0.01 毫米 vs 5.08 ± 0.08 毫米).
- 黄体 (CL) 输血在排卵后的5天内在Mated组 (14.9 ± 3.1%对比9.5 ± 3.1%) 显着更高.
- 在排卵后的Mated组 (0.66 ± 0.11 ng/mL vs. 0.42 ± 0.11 ng/mL) 中,血清孕激素度也显著增加.
结论:
- 多次交配,涉及阴茎透和射精,积极改变母羊的排卵前过程.
- 这种增强的生殖刺激导致白色生成和高级白色体 (CL) 质量和功能的改善.
- 这些发现表明,受控的多重交配可以成为优化绵羊生殖结果的策略.
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