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In Vitro Fertilization01:24

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In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
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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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牛中的超排卵和胚胎移植

G E Seidel

    Science (New York, N.Y.)
    |January 23, 1981
    PubMed
    概括

    1979年,超排卵和胚胎移植技术显著提高了牛的生殖能力,有助于宝贵的母牛繁殖和克服不孕症. 这些方法还促进了胚胎出口和基因测试,冷保存和性别测试变得越来越重要.

    科学领域:

    • 动物科学动物科学
    • 生殖生物学 生殖生物学
    • 兽医医学 兽医医学 兽医医学

    背景情况:

    • 牛的繁殖对畜牧业至关重要.
    • 传统的育种方法在提高精英动物的繁殖率方面存在局限性.
    • 辅助生殖技术 (ART) 的进步提供了潜在的解决方案.

    研究的目的:

    • 总结 1979 年北美牛中超排卵和胚胎移植的应用和影响.
    • 突出这些技术在提高宝贵奶牛的繁殖效率方面的作用.
    • 讨论新兴的应用,如胚胎冷保存和性别.

    主要方法:

    • 使用超排卵协议来刺激捐赠母牛的多次排卵.
    • 胚胎采集和转移程序被用来确定受体母牛的怀孕情况.
    • 收集和分析了产生的怀孕人数的数据.

    主要成果:

    • 1979年,在北美通过超排卵和胚胎移植实现了大约17,000例牛妊娠.
    • 这些ART主要用于加速基因优异牛的繁殖.
    • 其他关键应用包括克服不孕症,促进国际胚胎贸易和遗传载体查.

    结论:

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    • 1979年,超排卵和胚胎移植被确立为牛繁殖增强的有价值工具.
    • 胚胎冷保存的商业用途正在出现,这表明未来的进步.
    • 常规胚胎性别测试的可能性表明,可以进一步改进用于畜牧业的ART.