When there are uterine contractions, especially for the mid-pregnancy when the contractions have just begun to occur, the pregnant woman’s self-perception is mainly felt in the abdominal skin slightly hard, paroxysmal changes, sometimes light and sometimes heavy. But with the growth of pregnancy weeks, in the end of pregnancy, especially in labor, the symptoms of uterine contraction will obviously increase, this time the pregnant woman feels is obvious abdominal pain, the whole uterus as if to gather together, and there is a feeling of downward, in the case of the pain lasts a longer period of time, do not rule out the occurrence of regular contraction of the uterus, if in this case, accompanied by vaginal bleeding If this is accompanied by vaginal bleeding, it is considered that labor is approaching and hospitalization is required.