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.

目的探讨胞第一极与原核受精、裂胚胎质量的关系。

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，次级胞又分裂成两个大小不对等的新胞：一个相对很大的子（成熟胞）和一个微小的次级极。