中国兽医杂志2025，Vol.61Issue(4)：70-74,5.DOI:10.20157/j.cnki.zgsyzz.2025.04.009
GnRH或HCG处理黄体早期阶段西门塔尔肉牛对血清激素水平和繁殖性能的影响
Effects of GnRH or HCG Treatment During Early Luteal Phase on Serum Hormone Levels and Reproductive Performance in Simmental Beef Cattle
摘要
Abstract
To investigate the effects of gonadotropin-releasing hormone(GnRH)or human chorionic gonadotropin(HCG)treatment during the early luteal phase on serum hormone levels and reproductive performance in Simmental beef cattle,60 reproductively normal cows were randomly divided into three groups(n=20 per group).After estrus synchronization and artificial insemination(AI),cows in the GnRH group were intramuscularly injected with GnRH(200 μg/head)on day 5 post-AI,while those in the HCG group received an intramuscular injection of HCG(3 000 IU/head).The Control group received physiological saline.Serum progestin(P4),estradiol(E2),and interferon-tau(IFNT)levels were measured on days 5 and 14 post-AI.Pregnancy diagnosis was conducted on day 45 post-AI,and pregnancy rate,calving rate,and calf birth weight were recorded.The results showed that on day 14 post-AI,serum P4 and IFNT levels in the GnRH and HCG groups were significantly higher than those in the Control group(P<0.05),while serum E2 levels were significantly lower(P<0.05).Pregnancy rate,calving rate,and calf birth weight were higher in the GnRH and HCG groups than in the Control group,although the differences were not statistically significant(P>0.05).These findings indicate that GnRH or HCG treatment during the early luteal phase significantly increases serum P4 and IFNT levels while significantly decreasing serum E2 levels,leading to a 10%-15%increase in pregnancy rate.This study provides a reference for improving beef cattle reproductive efficiency and promoting high-efficiency production.关键词
促性腺激素释放激素(GnRH)/人绒毛膜促性腺激素(HCG)/母牛/孕激素/受胎率Key words
gonadotropin releasing hormone(GnRH)/human chorionic gonadotropin(HCG)/cow/progesterone/preg-nancy rate分类
畜牧业引用本文复制引用
张泽华,谢占峰,吕世春,张晗,贾振伟..GnRH或HCG处理黄体早期阶段西门塔尔肉牛对血清激素水平和繁殖性能的影响[J].中国兽医杂志,2025,61(4):70-74,5.基金项目
内蒙古自治区重点研发和成果转化计划(科技支撑东北振兴)项目(2022YFDZ0075) （科技支撑东北振兴）
内蒙古自治区直属高校基本科研业务费项目(GXKY22002) （GXKY22002）
