• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tropical Animal Health and Production >The effects of progesterone treatment following artificial insemination on the reproductive performance of dairy cows
【24h】

The effects of progesterone treatment following artificial insemination on the reproductive performance of dairy cows

机译：人工授精后孕酮处理对奶牛繁殖性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The objective of this study was to examine the effects of increasing circulating progesterone in multiparous Holstein cows, using an intravaginal progesterone implant between days 3 and 7 following fixed-time artificial insemination (FTAI). The animals were randomly assigned into two groups: (1) treatment group and (2) control (no treatment). The experiment took place during periods of high and mild temperatures. Pregnancy rates were evaluated by ultrasound at 30 and 60 days after FTAI; embryonic and fetal mortality rates were also evaluated on these dates. The temperature and humidity index on the day of FTAI were different (P < 0.05) during the times of interest, but it did not affect conception rates. Neither the conception rates at days 30 and 60 nor the embryonic and fetal mortality rates differed between the groups during either the high- or mild-temperature periods (P > 0.05). Throughout the experimental period, the serum progesterone concentration was higher in the treatment group than in the control (P < 0.05). We conclude that the intravaginal progesterone implant inserted from days 3 to 7 following FTAI had no effect on conception rates at days 30 and 60 or on embryonic or fetal mortality rates but enhances the serum progesterone concentrations following treatment in multiparous Holstein cows during high- and mild-temperature periods.
机译：这项研究的目的是研究在固定时间人工授精（FTAI）后第3天到第7天之间使用阴道内孕酮植入物来增加多头荷斯坦奶牛体内循环孕酮的影响。将动物随机分为两组：（1）治疗组和（2）对照（不治疗）。实验发生在高温和温和的时期。 FTAI后30天和60天通过超声评估妊娠率。在这些日期还评估了胚胎和胎儿死亡率。在感兴趣的时间，FTAI当天的温度和湿度指数有所不同（P <0.05），但这并没有影响受孕率。在高温或中温期间，两组之间第30天和第60天的受孕率以及胚胎和胎儿死亡率均无差异（P> 0.05）。在整个实验期间，治疗组的血清孕酮浓度高于对照组（P <0.05）。我们得出的结论是，FTAI后第3至7天插入的阴道内孕激素植入物对第30天和第60天的受孕率或胚胎或胎儿死亡率没有影响，但是在高和轻度期间对多头荷斯坦奶牛进行治疗后，血清孕酮浓度升高温度周期。

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