The ovulated secondary oocyte is still surrounded by the zona pellucida and a few layers of cells called the corona radiata.
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小斑处因水解酶激活、解聚作用而破裂,次级卵母细胞、第一极体、透明带、放射冠和一部分卵泡液由此排出,经腹腔进入输卵管。
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