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.

目的探讨细胞第一极体形态与原核受精形态、质量的关系。

The secondary oocyte now divides again into two new cells of unequal size: a relatively large ootid (mature egg cell) and a minute second polar body.

此时，次级母细胞又分成两个大小不对等的新细胞：一个相对很大的子（成熟细胞）和一个微小的次级极体。