Vaginal bleeding in early pregnancy may be due to fertilization of the egg, miscarriage with precursor, embryonic arrest and other reasons, which need to be analyzed specifically. 1. Fertilized egg implantation: some women will experience a small amount of bleeding during the implantation of the fertilized egg, which is not accompanied by obvious discomfort such as lumbago, and will not affect the development of the fetus at this time. 2. Pre-eclampsia: If the growth of the fetus is stimulated from outside, it may lead to unstable growth and impending miscarriage, and the pregnant woman’s vagina will bleed. 3. Embryonic arrest: If the growth and development of the fetus stops, it will be difficult to survive in the uterus, which will cause vaginal bleeding, which is a precursor to the imminent expulsion of the dead fetus. When bleeding occurs in pregnant women, it may also be due to ectopic pregnancy, hyperemesis gravidarum, etc. It is recommended to go to the hospital in time for medical checkups to clarify the cause of the disease and then carry out standardized treatment under the guidance of the doctor to promote the normal growth and development of the fetus.