At 35 weeks of pregnancy, the vague pain in the stomach may be caused by the physiological situation of the growing fetus and pelting, or it may be caused by placental abruption, preterm labor and other adverse reasons. Pregnant women should not take it lightly and should go to the hospital regularly for examination to confirm the condition of the fetus and themselves so as not to delay the treatment. I. Physiological factors and treatment: 1. fetal development: mainly due to the rapid growth of the fetus in late pregnancy, which in turn leads to the expansion of the pregnant woman’s uterus, the enlarged uterus stimulates the pelvic organs, and may also be the hidden pain caused by the fetal head entering the pelvis, resulting in a certain degree of extrusion and pain, pain symptoms can be gradually relieved after rest; 2. pseudo contractions: pseudo contractions due to the increased sensitivity of the uterine muscle layer can also lead to the appearance of The pseudo contractions can be relieved after resting or changing position. Pathological factors and treatment: 1, placenta abruptio: late pregnancy, some pregnant women with high blood pressure, smoking history, abdominal trauma may occur placenta abruptio, light placenta abruptio will be accompanied by mild abdominal pain, the degree of pain depends on the size of the stripping surface, and most will be accompanied by vaginal bleeding, serious cases of pregnant women will appear fetal movement disappeared, or even shock. If the placenta abruptio is of degree I and the fetal vital signs and maternal status are good, it can be temporarily observed and monitored. If the placenta abrupts in degree II or III, and the pregnant woman cannot deliver in a short time, she should have a cesarean section in time to avoid damage to the fetus caused by placenta abruptio; 2. Premature labor: before 37 weeks of gestation, there is vague pain in the lower abdomen, accompanied by a small amount of vaginal bleeding, the pain has no obvious regularity, the duration is relatively short, the interval is long, sometimes at night and disappears during the day. This is a case of preterm labor. You should go to the hospital immediately to check whether the opening of the uterus is wide and whether the fetal vital signs are good, and use contraction inhibitors to prevent contractions in time so that the fetus can stay in the mother’s body as long as possible to help its development. If the opening of the uterus is too wide to avoid preterm delivery, the fetus should be delivered and sent to the neonatal unit for examination and exclusion of diseases.