The exact time of labor after cervical dilatation cannot be generalized, but depends on the contractions and the degree of opening of the uterus, and varies from one individual to another. Labor begins when the woman enters the second stage of labor from the first stage. The first stage of labor is characterized by regular contractions, the flattening of the cervical canal and the opening of the uterine opening, and is divided into the latent stage, which is the slow dilatation of the uterine opening, and the active stage, which is the accelerated dilatation of the uterine opening. At the end of the first stage of labor, the opening of the uterus enters the second stage of labor, which represents the beginning of labor, which takes about 11-12 hours for primigravid women and 6-8 hours for transient women, and the exact time varies from person to person. The second stage of labor usually takes less than 2 hours. The third stage of labor is from the delivery of the fetus to the delivery of the placenta, which takes about 15 minutes. Pregnant women need to save their energy and adjust their mindset before labor to avoid excessive anxiety and tension that may affect the labor process. If the progress of labor is not smooth or prolonged, it is easy to lead to fetal hypoxia, so regular monitoring of the fetal heart rate changes during labor, once the labor stagnation or intrauterine distress occurs, should be timely preparation for cesarean section.