The time from the opening of the uterus to the delivery of the fetus and placenta varies from person to person, ranging from a few hours for the shortest to more than 20 hours for the longest. The first stage of labor is from regular contractions to full opening of the uterus, which usually takes 11-12 h for primigravida and not more than 20 h. This period includes an incubation period of 8 h and an acceleration period of 4 h. The incubation period is from regular contractions to opening of the uterus to 3 cm, and the acceleration period is from opening of the uterus to 3 cm to 10 cm. The second stage of labor is from full opening of the uterus to delivery of the fetus, which takes 2-3 hours for primigravida and 10-3 hours for menstruating mothers. It takes 2-3 hours for first-time mothers and 10-30 minutes for women in labor. The third stage of labor is the delivery of the placenta, which usually takes 5-15 minutes and not more than 30 minutes for pregnant women. In case of prolonged labor, other methods of delivery may be required. In conclusion, the length of labor varies from woman to woman, some of them take longer than others, so pregnant women and their families should be prepared.