When touching the abdomen, the uterus is soft, but sometimes it feels like a hard ball suddenly appears, and that is the contraction. The process of contractions is progressive. At the beginning, the uterus contracts irregularly and weakly, when the pregnant woman puts her hand on her abdomen, she will feel the abdomen harden from time to time, but this contraction will not produce pain. This period usually occurs some time before labor. Some people feel that the pain is not intense and can be tolerated; some people feel that the pain is similar to the pain in the abdomen during menstruation, but some people feel that the pain is so unbearable that they want to get into a crack in the ground. However, as labor approaches, the pain will be strengthened, the interval between contractions will be shortened, the pain will be prolonged, and even the feeling of defecation will arise. Free position during labor can reduce the discomfort of contractions, encourage free position for labor, standing is better than sitting, sitting is better than lying, lying on the side is better than lying on the back, encourage pregnant women to understand the process of childbirth through various forms during pregnancy, relax and welcome the arrival of love crystals with a happy mood.