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，次级卵母细胞又分裂成两大小不对等新细胞：一相对很大卵子（成熟卵细胞）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.

讨卵细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。