形成完全正常的两极胚状体。
经统计分析，早期囊胚的存活率极显著高于桑椹胚（P＜0.01）。
The survival rats of early blastocyst groups were significantly higher than the morula groups (P<0.01).
胚残存率与碾精时间呈极显著负相关。
There was significantly negative relationship between embryo surviving rate and milling time.
形成完全正常的两极 胚状体 。
形成完全正常的两极 胚状体 。
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