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Updated: Jul 17, 2025

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在一项随机试验中,霍尔斯坦公牛在超排卵期间的孕激素度的影响

J C S Marques1, J P O Maciel2, J Denis-Robichaud1

  • 1Faculty of Land and Food Systems, University of British Columbia, Vancouver V6T 1Z4, Canada.

Journal of dairy science
|August 29, 2023
PubMed
概括

在超卵性公牛的卵泡生长期间,更高的孕水平影响了卵泡数量和胚胎质量,而雌激素强度与胚胎产量相关. 这项研究影响了牛的生殖策略.

关键词:
奶牛牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛奶牛母牛生产胚胎的生产过程.胚胎质量 胚胎质量雌性表达的表达方式

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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...
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