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

成雌雄原核成后完成融合过程，成合核，受精过程结束。

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.

目探讨卵细胞第一态与原核期受精卵态、卵裂期胚胎质量关系。