The experiment results showed that expansive ratcs of cumulus cells were 80.65, 86.00, 85.40 and 85.71％ respectively in 4 groups, there were no significantly diflbrents between groups（p<0.05）; releasing rates of first polar body（PbI） were 16.47, 7.41, 12.28 and 19.23％ respectively, the second group was significantly lower than the others （p<0.05）.
第一极体放出率分别为16.47％、7.14％、12.89％和19.23％。 第二组低于其他各组,但差异不显著（P>0.05）。
参考来源 - 家兔卵巢卵母细胞体外成熟和体外受精的初步试验·2,447,543篇论文数据，部分数据来源于NoteExpress
Conclusion Zygotes and embryo quality can be predicted by morphology of the first polar body.
结论通过卵细胞第一极体形态可预测受精卵及卵裂期胚胎质量。
The results indicated that nutria oocytes, like other rodent oocytes, can be matured in vitro, complete first meiotic division and discharge first polar body.
结果表明海狸鼠卵母细胞与其它啮齿动物的卵母细胞一样，能够在体外培养成熟，完成第一次减数分裂，排出第一极体。
Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.
目的探讨卵细胞第一极体形态与原核期受精卵形态、卵裂期胚胎质量的关系。
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