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，次级卵母细胞成两大小不对等的新细胞：相对很大的卵子（成熟卵细胞）和小的次级极体。

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.

目的探讨卵细胞第极体形态与原核期受精卵形态、卵期胚胎质量的关系。