A set of 8 models (14 pieces total) illustrates in great detail the main stages of pregnancy development. Features include: first month embryo, second month embryo, third month embryo, fourth month fetus (transverse lie), fifth month fetus (breach position), fifth month fetus (transverse lie), fifth month twin fetuses (normal position) and seventh month fetus (normal position). Each model is mounted on a stand and base. Dimensions: 4.3"x 6"x 8"each (11 x 15 x 20cm).