不同季节对牛冻融胚胎移植效果的影响

Effects of Different Seasons on the Transplantation Result of Frozen-thawed Embryos of Cattle

中文关键词: 不同季节  胚胎移植  冻融胚胎  妊娠率  流产率

英文关键词: different seasons  embryo transfer  frozen-thawed embryo  pregnancy rate  abortion rate

中文摘要:

      [目的]为探究不同季节（月份）对西门塔尔牛冻融胚胎移植效果的影响。[方法]分析2015年10月—2017年8月在张掖和定西地区移植冻融胚胎143枚，其中春、夏、秋、冬分别移植36枚，58枚，45枚，4枚。[结果]在本试验条件下，春、夏、秋、冬的妊娠率分别是61.11%（22/36），72.41%（42/58），80.00%（36/45），25%（1/4）；春、夏、秋、冬的流产率分别是31.82%（7/22），23.81%（10/42），30.55%（11/36），100%（1/1）；经检验，组间差异极显著（P<0.01）。7月中旬，9月，10月妊娠率均在80%以上，4月和7月下旬均在60%左右，1月只有25%。[结论]在甘肃秋季是牛冻融胚胎移植较佳的季节。

英文摘要:

      [Objective] It was to explore the effects of different seasons (months), on the transplantation of frozen-thawed embryos of Simmental cattle in Gansu province. [Method] Analysis of 143 freeze-thaw embryos transferred in Zhangye and Dingxi from October 2015 to August 2017, including 36, 58, 45 and 4 embryos respectively in spring, summer, autumn and winter. [Result] The results showed that pregnancy rate in spring, summer, autumn and winter respectively was 61.11%(22/36), 72.41%(42/58), 80.00%(36/45), 25.00%(1/4); that abortion rate of cattle in spring, summer, autumn and winter respectively was 31.82%(7/22), 23.81%(10/42), 30.55%(11/36), 100%(1/1). Differences among groups were extremely significant by Chi-square testing (P< 0.01). Rate of pregnancy of the second ten-day period of July, September, October are all over 80%; that of April and the third ten-day period of July was about 60%; that of January was only 25% (1/4). [Conclusion]Autumn was better season for transplantation of frozen embryos in Gansu province.