Miscarriage refers to the termination of pregnancy before the embryo or fetus has the ability to survive is called miscarriage, divided into early miscarriage and late miscarriage, the main symptoms of miscarriage are vaginal bleeding and abdominal pain after menopause. Early miscarriages first appear vaginal bleeding, because the embryo and fetus death chorionic villi and meconium stripped, blood sinuses open, vaginal bleeding gradually increased, stripped of the placenta and blood stimulate uterine contraction, the patient will feel pain in the lower abdomen with the discharge of the embryo and other pregnancy material, resulting in paroxysms of pain in the lower abdomen, the uterine contraction after the complete discharge of the embryo and appendage, the pain in the lower abdomen is gradually relieved, the amount of vaginal bleeding The pain in the lower abdomen gradually subsides and the vaginal bleeding gradually decreases until it stops. Late miscarriage is similar to preterm labor in that the paroxysmal abdominal pain is often accompanied by a small amount of vaginal bleeding or bloody discharge, which gradually develops into regular pain in the lower abdomen, and after the delivery of the fetus and the delivery of the placenta, the amount of vaginal bleeding begins to bleed, which is usually not much, and gradually stops as the pain in the lower abdomen decreases.