Contractions usually occur every 5 to 6 minutes and last for about 30 seconds. Opening refers to the opening of the uterine opening, and it usually takes a certain contraction pressure and regular contractions to soften the cervix and open the fingers. Finger opening occurs when the contraction pressure reaches 50mmHg or more and a regular contraction lasting about 30 seconds occurs in about 5 minutes. Pregnant women can feel paroxysmal pain accompanied by tightness and hardness in the abdomen, in this case the uterus will usually open up after two hours, but if the contraction is weak and the interval between contractions is long, the fingers may not open for a few days. If contractions occur, it is important to go to the hospital in time to wait for labor, closely observe the physical condition, and the doctor closely monitor the progress of labor to avoid adverse consequences.