The male and female pronucleus fused finally.Most hybrids could develop normally.

成熟雌雄原核形成后完成融合过程，形成合子核，受精过程结。

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.

探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。