When a woman gives birth to a baby, she will definitely be in pain, and this pain mainly comes from the contractions of the uterus, and they are very painful and can last for a long time. The normal labor of a woman is counted from the beginning of regular contractions until the delivery of the fetus and placenta, which lasts about 24 hours. The average duration of labor is 11-12 hours, with a maximum of 24 hours and a minimum of 3 hours. If the total duration of labor is shorter than 3 hours, it is considered a rapid labor, which is an abnormal labor that is detrimental to the safety of the fetus and the pregnant woman. The sign that a woman is in labor is regular contractions, usually 5-6 minutes in between and lasting 20-30 seconds. As the fetus descends and labor progresses, the contractions will become stronger and stronger, the pressure in the uterine cavity will become greater and greater, and the woman’s pain will become more and more pronounced, and the duration of the pain will become longer and longer, lasting 30-40 seconds, with shorter and shorter intervals, with intervals of 3-4 minutes. When the fetus crosses the pelvic outlet and reaches the vaginal opening, within an hour of delivery, it is called the period of fetal delivery. At this time, the pain of the mother will be even stronger, usually lasting 50-60 seconds, and the pressure in the uterine cavity is even higher, with an intermittent interval of only 1-2 minutes before the fetus can be delivered successfully.