J3C4.19.449 Labor Delivery Module
1. Six labor stations selected to represent conditions of the cervix and vagina prior to labor, during labor, and at birth.
2. Stations illustrated are: STA -5 prior to onset of labor; STA -4 cervix partially effaced; STA -3 cervix fully effaced; STA 0 fetal head at plane of ischial spine: STA +2 cervix nearing full dilation; STA +5 crowning of fetal head.