Six labor stations selected to represent conditions of the cervix and vagina prior to labor, during labor, and at birth. 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