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.

目探讨卵细胞第一极体形态与原核受精卵形态、卵裂胚胎质量关系。

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，次级卵母细胞又分裂成两个大等新细胞：一个相很大卵子（成熟卵细胞）和一个微次级极体。