After the premature rupture of membranes, it usually takes 10 to 12 hours for a primiparous woman to dilate her uterus and 7 to 9 hours for a parturient woman to deliver the baby. There are three stages of labor: the first stage of labor, from dilatation to full opening of the uterus; the second stage of labor, when the fetus is delivered; and the third stage of labor, when the placenta and fetal membranes are expelled. For primigravid women, this time can be as short as 10 to 12 hours, and as long as more than 15 hours, while the labor process for experienced women is relatively shorter, usually around 7 to 9 hours. There are individual differences in the length of the labor process, related to the size of the fetus, the amount of activity during pregnancy, the condition of the mother’s pelvis, and many other factors, and both primigravida and transient mothers can have emergency labor (total labor duration less than 3 hours), with transient mothers being relatively more common. Pregnant women with a history of emergency labor should be admitted to the hospital early under the guidance of an obstetrician.