When a woman becomes pregnant, a poorly developed embryo can lead to a miscarriage. A miscarriage can occur with the symptom of vaginal bleeding. Therefore, it is necessary to distinguish vaginal bleeding after pregnancy from normal menstruation. Distinguishing pregnancy bleeding from normal menstruation is based on the following: 1. Generally, patients who bleed after pregnancy have a history of menopause, whereas normal menstrual periods do not have a history of menopause. Therefore, a history of menopause is the preferred basis for distinguishing pregnancy bleeding from normal menstruation. 2. Pregnancy bleeding is characterized by a small amount of vaginal bleeding that lasts for a long period of time and is continuous. Normal menstruation has a fixed number of days and a fixed amount of bleeding. Therefore, if the last menstrual period is different from the previous menstrual period, then you need to be alert to the occurrence of post-pregnancy bleeding. 3, post-pregnancy bleeding, if the pregnancy continues unresolved, then the vaginal bleeding will persist, and may even cause the patient secondary anemia. In contrast, normal menstrual periods, after the menstrual period has passed, vaginal bleeding will stop on its own. To summarize, the difference between vaginal bleeding after pregnancy and normal menstruation mainly lies in the duration of vaginal bleeding and the amount of vaginal bleeding.