1.This model consists of eight models of gestational embryo development one, two, three, four, five, six, seven months and five months twins. The embryos of four, five, six, seven months and five months can be taken out. The structures of uterus, vagina, fetus, umbilical cord, placenta, amniotic cavity, ovary and fallopian tube were displayed.  
2.Each model has structural indicators.