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，母细胞又分裂成两大小不对等的新细胞：一相对很大的子（成熟细胞）和一微小的。

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.

目的探讨细胞第一形态与原核期受精形态、裂期胚胎质量的关系。