Dilatation of the uterine opening is divided into two stages: at the beginning of labor, the interval between paroxysms is about 5-10 minutes, the abdominal pain is mild, the uterus contracts regularly, and the uterine opening opens a little. After some time, the interval between labor pains is 4-5 minutes, strong uterine contractions are felt, and the mouth of the uterus is half open at this time. After some time, the interval between contractions will be about 2-3 minutes, and the contractions will be more intense, making you feel helpless. In the final stage, the paroxysm interval is about 1 minute, the mouth of the uterus will be fully open, and become a channel for the birth of the fetus, to keep pushing. Generally before labor, the labor pains are weak, you can give the right amount of oxytocin, by controlling the intensity of the labor pains, to promote labor.