The Childbirth Graphics Cervical Stacker Model teaches the progression of cervical dilation The model's ten removable rings depict each centimeter of cervix dilation from 1 cm to 10 cm. Each ring is color-coded to represent its corresponding phase of labor. The rings depicting 1 cm to 6 cm of dilation are blue to represent early labor, the rings depicting 6 cm to 8 cm of dilation are yellow to represent active labor, and the rings depicting 9 cm to 10 cm of dilation are pink to represent transition. Comes with convenient protective carrying case. Model measures 5" x 2" x 5"
