All pregnant women have contractions since 14 weeks of pregnancy, generally such contractions are not painful and occur occasionally, with the increase of pregnancy weeks, the frequency of such contractions will also increase, after 34 weeks of pregnancy, especially after 37 weeks of pregnancy such contractions are more and more strong, occasionally there will be lower abdominal paroxysmal vague pain. 37 weeks of lower abdominal vague pain can be seen in the following aspects. 1, normal labor: 37 weeks of pregnancy has been full-term, at any time will be in labor, and contractions is a sign of pre-labor, contractions will appear lower abdominal paroxysmal pain, so the contractions can cause vague pain in the stomach. The abdominal pain caused by contractions is paroxysmal, the intensity of abdominal pain is increasing, no discomfort during the interval, often accompanied by a small amount of vaginal bleeding, that is, redness, fetal movement between contractions as usual, paroxysmal pain in the lower abdomen of primiparous women for 5-6 minutes a burst need to be hospitalized for delivery. 2, placental abruption: placental abruption is a serious pregnancy complication, not timely treatment will endanger the lives of pregnant women and fetuses. The main symptom of placental abruption is persistent abdominal distension, abdominal pain, accompanied by frequent contractions, examination reveals abdominal tension, uterine body with pressure pain, vaginal bleeding can be present, the amount of bleeding does not match the symptoms of anemia; persistent abdominal pain should quickly seek medical attention and timely examination except for placental abruption. Placental abruption often has abnormal fetal heartbeat or fetal death in the uterus, ultrasound shows hematoma behind the placenta, once diagnosed, the pregnancy needs to be ended quickly, most of them need emergency cesarean delivery, sometimes for the safety of the pregnant woman’s life, even if the fetus dies, a cesarean delivery is also needed. 3, uterine fibroid degeneration: the original fibroids during pregnancy will bleed and necrosis, resulting in the red degeneration of fibroids, which will cause persistent abdominal pain, accompanied by frequent contractions, and the abdominal pain is heavier at the site of fibroids. If you have a history of fibroids before pregnancy, or if the fibroids are detected by ultrasound in early pregnancy, you may have hidden pain in the abdomen at 37 weeks of pregnancy, and at the same time, hard masses with pressure pain can be palpated by pressing the uterus, and some pregnant women have irregular contractions; fibroids are detected by ultrasound, and elevated white blood cells are found in routine blood tests. 4, appendicitis, cholecystitis, pancreatitis: if pregnant women have abdominal pain accompanied by symptoms of the digestive tract, such as nausea and vomiting, it is not excluded that it is caused by inflammation of the digestive tract, and they need to seek medical attention for differential diagnosis as soon as possible. Appendicitis at 37 weeks of pregnancy can easily perforate and cause diffuse peritonitis, requiring early surgery; gallbladder infection at 37 weeks of pregnancy requires anti-inflammatory treatment; pancreatitis is serious once it strikes, often requiring a quick cesarean section to end the pregnancy. In summary, the vague pain in the stomach at 37 weeks can be caused by a variety of reasons, if the pain is not paroxysmal, regardless of the cause, pregnant women are advised to seek medical attention quickly.