1.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.

1.目探讨细胞第一极体与原核受精、裂胚胎关系。

2.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.

2.此时，次级母细胞又分裂成两个大小不对等新细胞：一个相对很大子（成熟细胞）和一个微小次级极体。