Fetal Development Stages Model, 7 Stages7 individual fetal development models Each stage has description on bottom left The models are mounted on a solid 18"x14" base Models are hand painted with great detail Includes: 1 Set of 7 Models This set of 7 anatomical cross sectional pelvic models demonstrate the major stages of child birth: A. The fetal head settles into the pelvic inlet B. The first stage of labor when the uterus begins contracting irregularly C. Dilation of the mother's cervix