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

成熟的雌雄原核成后完成融合，成合核，受结束。

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体态与原核期受卵态、卵裂期胚胎质量的关系。