In early pregnancy, if a miscarriage occurs, there are usually the following symptoms: first, the more common is vaginal bleeding, many pregnant women with pre-eclampsia will have varying degrees of vaginal bleeding in early pregnancy, mostly brown or dark black discharge, which is significantly less than the amount of menstruation, and the bleeding will increase significantly after activity or emotional excitement, and can be relieved after rest. The second is abdominal pain, which is similar to the pain in the stomach during menstruation and is mainly caused by uterine contractions. Thirdly, abnormal test results, such as low progesterone level, or HCG doubling is not particularly satisfactory, etc.