In early pregnancy, menstruation does not occur. After pregnancy, a woman’s menstrual flow temporarily stops, and vaginal bleeding is abnormal if it occurs in early pregnancy. If you have vaginal bleeding in early pregnancy, you should be alert to the cause of ectopic pregnancy, miscarriage, or fetal abortion, rather than assuming that it is a menstrual flow. If you have vaginal bleeding in early pregnancy, you should go to the hospital promptly to check the cause of the bleeding and then treat it according to the cause. In addition to vaginal bleeding in early pregnancy, it is also important to observe whether there will be discomfort such as increased discharge and abdominal pain. The first three months of pregnancy are a period of instability for the fetus, which may cause miscarriage if you are not careful. During the first trimester, you should pay more attention to bed rest, not to do strenuous sports or exercise, and not to have sexual intercourse.