A set of nine models, most accurate, mounted on stand, consists of the following stages: 1. An embryo about 6 days old, considerably enlarged. 2. Uterus with the embryo in the 1st month, of gestation. 3. Uterus with the embryo in the 3rd month, of gestation. 4. Uterus with foetus in 4th and 5th month. 5. Uterus with foetus, placenta and umbilical cord. 6: Uterus with foetus in 5th month. 7. Uterus with foetus in the 7th month of pregnancy. 8. Uterus with foetus in the 8th month of pregnancy. 9. Uterus with foetus in the 9th month of pregnancy.