首页> 外文期刊>Archivos Latinoamericanos de Produccion Animal >Infertilidad asociada con la duración de la fase luteal en vacas postparto
【24h】

Infertilidad asociada con la duración de la fase luteal en vacas postparto

机译:与产后母牛黄体期持续时间相关的不育

获取原文
           

摘要

After first postpartum ovulation most cows have a short luteal phase due to a premature secretion of PGF2α from the uterus. Pregnancy rate in estrous cycles with short luteal phases is essentially nil. The lack of exposure of the uterus to P4 and estrogen prior to first postpartum ovulation decreases the concentration of P4 receptors and up regulates oxytocin receptors. The inadequate number of P4 receptors and presence of endometrial oxytocin receptors earlier in cows with short than normal luteal phases allows premature release of PGF2α and the resultant regression of the CL. During luteolysis, uterine and luteal PGF2α cause death of the embryos mainly during the transition from morula to blastocyst when the embryos are more susceptible to embryotoxic effect.
机译:产后首次排卵后,大多数母牛由于子宫中PGF 2 α的过早分泌而具有短的黄体期。黄体期短的动情周期的妊娠率基本上为零。第一次产后排卵前子宫缺乏P 4 和雌激素的暴露会降低P 4 受体的浓度并上调催产素受体。黄体期短于正常黄体期的母牛中P 4 受体的数量不足和子宫内膜催产素受体的存在使得PGF 2 α过早释放并导致CL的消退。在黄体溶解过程中,子宫和黄体PGF 2 α导致胚胎死亡,主要是在从桑ula到囊胚的过渡时期,而胚胎更容易受到胚胎毒性作用的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号