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.

目的探讨卵一极体形态与原核受精卵形态、卵胚胎质量的关系。

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，次级卵母又两个大小不对等的新：一个相对很大的卵子（熟卵）和一个微小的次级极体。