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

熟的雌雄原核完融合过程，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.

目的细胞第一极体态与原核期受精态、裂期胚胎质量的关系。