A set of nine detailed models, mounted on stands, showing the following stages : 1. An embryo about 6 days old, considerably enlarged 2. Uterus with the embryo in 1st month of gestation 3. Uterus with the embryo in 3rd month of gestation 4. Uterus with foetus in 4th month 5. Uterus with foetus, placenta and umbilicle cord 6. Uterus with foetus in 5th month 7. Uterus with foetus in 7th month of pregnancy 8. Uterus with foetus in 8th month of pregnancy 9. Uterus with foetus in 9th month of pregnancy complete with key cards