There are obvious differences between menstruation and miscarriage:1. Different reasons, women with mature ovaries have regular menstruation, usually every month, while miscarriage is the stagnation of fetal development after an unwanted pregnancy due to a variety of problems, so there is a clear difference between menstruation and miscarriage.2. Different amount of bleeding, the amount of bleeding during the period of menstruation is from less to more, the total amount of blood clots discharged around 20-60ml, occasionally, and there is no other foreign matter appearing. Miscarriage bleeding is more or less, there is a gestational sac discharge, the gestational sac is fluffy flesh, and blood clots are very different, can be detected to determine.3, the pain is different, before and after menstruation will have the symptoms of abdominal pain, when the gastrointestinal function is weak, dietary impropriety will have gastrointestinal discomfort. Pre-eclampsia will have abdominal drop and pain, lasting a long time, some patients have severe pain, the pain site is concentrated in the abdomen and waist. 4, in addition, during menstruation, there will be abnormal symptoms of the body manifestations, such as breast swelling, pain, etc., and miscarriage is not.