Bleeding may occur in early pregnancy and is considered to be implantation bleeding. Secondly, we cannot rule out the possibility of preeclampsia, ectopic pregnancy or suffering from diseases such as cervicitis. 1. Bleeding on implantation: Bleeding on implantation refers to a small amount of vaginal bleeding in some pregnant women after the fertilized egg has been implanted. The bleeding is less than the usual amount and duration of menstruation, and most of them do not feel any pain. 2. Pre-eclampsia: Pre-eclampsia refers to a small amount of vaginal bleeding before the 28th week of pregnancy. There are many causes of preeclampsia, such as severe anemia, infection and other diseases, insufficient corpus luteum function of pregnant women, and excessive smoking and alcohol abuse by pregnant women. Pre-eclampsia will have a small amount of vaginal bleeding, the color is mostly dark red, some people will have lower abdominal pain and other symptoms. 3. Ectopic pregnancy: Ectopic pregnancy refers to the fact that the fertilized egg does not enter the uterine cavity and settles in other parts of the body, usually in the fallopian tube. As the gestational sac enlarges, causing the fallopian tube to rupture, symptoms such as vaginal bleeding and abdominal pain will occur. Therefore, when bleeding occurs in early pregnancy, it is recommended to go to the hospital to clarify the cause and then deal with it in time under the guidance of the doctor.