Mid-pregnancy uterus beating below if there is no abdominal pain and vaginal bleeding phenomenon is a normal performance, but if there is abdominal pain and vaginal bleeding phenomenon is an abnormal phenomenon. 1. Normal performance. Mid-pregnancy uterine throbbing below the uterus may be the uterus increases pressure on the abdominal aorta abdominal aortic pulsation, or fetal diaphragmatic spasms and fetal movement, etc., generally do not have obvious abdominal pain and lumbar pain, vaginal bleeding and other abnormalities, belong to the normal physiological manifestations, do not need special treatment, pay attention to rest and observation can be. 2. Abnormal phenomena. Mid-pregnancy uterine throbbing underneath if accompanied by abdominal pain and vaginal bleeding symptoms may be related to premature labor caused by uterine contractions, is an abnormal phenomenon, we should do ultrasound examination in a timely manner to give fetal preservation treatment, and pay attention to bed rest, forbidding sexual intercourse and exertion. In the middle of pregnancy, the uterus beats below the need for close observation, as long as there are no uncomfortable symptoms do not need special treatment, such as abdominal pain, bleeding and other abnormal phenomena, we must promptly check the cause of treatment.