FERTILIZATION AND EMBRYONIC MORTALITY-RATES IN BEEF HEIFERS AFTER ARTIFICIAL-INSEMINATION
FERTILIZATION AND EMBRYONIC MORTALITY-RATES IN BEEF HEIFERS AFTER ARTIFICIAL-INSEMINATION
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DOI：
10.1530/jrf.0.0590463
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发表时间：
1980-01-01
期刊：
影响因子：
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通讯作者：
SREENAN, JM
中科院分区：
文献类型：
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作者：
DISKIN, MG;SREENAN, JM
繁殖障碍是影响肉牛和奶牛产量的主要因素之一。共256头肉牛，在2个实验中，被用来建立受精率和随后的胚胎存活率。单次人工授精后的受精率为90%。对胚胎存活率的合并估计显示，至第8天的存活率较高（93%），但在第12天（56%）、第16天（66%）和第42天（58%）的存活率显著降低（P < 0.001）。显然，大多数胚胎死亡发生在8-16天之间。
Reproductive failure is one of the major factors affecting output in beef and dairy herds. A total of 256 beef heifers, in 2 experiments, was used to establish fertilization rate and subsequent embryo survival rates. Fertilization rate following a single artificial insemination was 90%. Pooled estimates of embryo survival showed high survival rates up to day 8 (93%) but markedly reduced (P < 0.001) survival at days 12 (56%), 16 (66%) and 42 (58%). Apparently most embryonic mortality occurs between days 8-16.