The document outlines the three stages of labor: the first stage is dilation of the cervix from the first contraction until it is fully dilated, taking on average 8 to 20 hours for a first baby. The second stage is expulsion from full dilation until birth, taking 5 to 45 minutes. The third stage is delivery of the placenta within 10 to 20 minutes of birth. Each stage outlines typical signs, duration, and events that occur.