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.

目的探讨卵第形态与原核受精卵形态、卵裂胚胎质量的关系。

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，次级卵母分裂成两个大小不对等的新：个相对很大的卵子（成熟卵）和个微小的次级。