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

熟的雌雄原核后完融合，合核，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卵态、卵裂期胚胎质量的关系。