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

成的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.

目的探讨卵细胞第一极与原核期受精卵、卵裂期胚胎质量的关系。