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，次级卵母胞又分裂成两小不对等胞：一相对卵子（成熟卵胞）和一微小次级极体。

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.

目探讨卵胞第一极体形态与原核期受精卵形态、卵裂期胚胎质量关系。