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，胞又分裂成两大小不对等新胞：一相对很大子（成熟胞）和一微小极体。

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.

目探讨胞第一极体形态与原核期受精形态、裂期胚胎质量关系。