A set of 9 models illustrates the detailed stages of pregnancy development. Featuring first month embryo, second month embryo, third month embryo with fetus in (breech position), forth month embryo with fetus in (normal position/head downward), fifth month embryo with fetus in (trans position), fifth month twins fetuses in (same position, fifth month twins features in (different position), sixth month fetus in (head downward position), and sixth month fetus in (transverse position). Each model is mounted on a base and made from PVC.