One of the two sperm cells moves to theegg celland fuses with it to form a zygote, and another one to central cell and fuses to form the endosperm,which completes the double fertilization.

Torenia fournieri is a special plant withembryo sac partly protruding through the micropyleof ovule, and its egg cell, two synergids and part ofthe central cell can be clearly observed using lightmicroscope (Plate I-1, 2).

The sperms were attached to the egg cell plasma membrane after .

Study on the mechanism of oocyte aneuploidy by spectral karyotyping;

Study on the mechansim of oocyte aneuploidy formation by multicolor fluorescence in situ hybridization;

Study on the oocyte apoptosis during human fetal folliculogenesis;

Vitrification of human oocytes and embryos has become an important assisted reproductive technology.

Effects of sucrose of different concentrations on GV and MⅡ vitrificated oocyte spindle;

Expression of trophinin in human oocytes and preimplantation embryos;

Epidermal growth factor improves in vitro maturation of immature mouse oocytes;