The model consists of eight models of gestational embryonic development process such as one, two, three, four, five, six and seven-month embryos and five-month twins, among which the fetuses of four, five, six and seven-month embryos and five-month twins models can be removed and the structures of uterus, vagina, fetus, umbilical cord, placenta, amniotic cavity as well as ovaries and fallopian tubes are displayed.