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The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual,  the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter...
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结合两种可注射的孕激素配方,用于雌性母羊的雌性同步.

Milena Luzorio Simões1, Felipe Zandonadi Brandão1, Juliana Dantas Rodrigues Santos1

  • 1Faculdade de Veterinária, Universidade Federal Fluminense, Niterói, RJ, Brasil.

Animal reproduction
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PubMed
概括

注射性孕激素 (iP4) 有效地同步雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性雌性 添加GnRH可以改善黄体质量,增强绵羊的生殖管理潜力.

关键词:
毛囊的动态 毛囊的动态生殖效率提高的生殖效率.生殖季节性 生殖季节性羊群羊群羊群的羊群是什么意思

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科学领域:

  • 兽医科学 兽医科学 兽医科学
  • 生殖生物学 生殖生物学
  • 动物科学动物科学

背景情况:

  • 雌性同步对于高效的绵羊繁殖计划至关重要.
  • 传统的孕激素同步方法包括阴道内装置.
  • 新的注射性孕激素 (iP4) 配方提供了替代方法.

研究的目的:

  • 为了评估长效和短效注射性孕激素 (iP4) 对于雌性母羊的雌性同步的疗效.
  • 为了比较iP4与传统的阴道内孕激素装置的有效性.
  • 为了确定性腺激素释放激素 (GnRH) 管理是否改善了iP4治疗的生殖结果.

主要方法:

  • 两项实验涉及圣伊内斯和科里代尔羊.
  • 绵羊用阴道内装置或组合iP4配方进行治疗.
  • 一些母羊与iP4同时接受GnRH,以评估其影响.
  • 监测了包括雌性,排卵,卵泡动态和孕激素水平在内的生殖参数.

主要成果:

  • 结合Ip4有效诱导人工质阶段和同步雌性在母羊.
  • iP4的疗效与传统的阴道内孕激素器件相提并论.
  • 将GnRH与iP4治疗相结合,增强了黄体质量,通过增加直径和血管化证明了这一点.
  • 在第一个实验中,在iP4治疗时观察到更同步排卵的趋势.

结论:

  • 组合注射性孕激素 (iP4) 是雌性母羊中雌性同步的有效替代品.
  • 补充GnRH可以改善黄细胞功能,这可能有利于绵羊的生殖管理.
  • 需要进一步的实地研究来评估这些方案的生育结果.