The two polar nuclei move from antipodal end to micropylar end before sperm releasing in a gap between egg cell and central cell and subsequently taking off cytoplasm one after another.

• 两精子释放于卵细胞与中央细胞的间隙后，精子先后脱去细胞质鞘，移向卵核的精核的运动速度快于移向极核的精核；