Usually, the fertilized egg is laid about 7 days after conception. Some patients may experience a small amount of vaginal bleeding when the fertilized egg is laid, which usually lasts for 2-3 days. After the fertilized egg has implanted in the endometrium, it stimulates the endometrium and causes the endometrial blood vessels to rupture, resulting in vaginal bleeding. When the bleeding is small, it is manifested as blood in the white belt, but the overall bleeding should not be more than the usual amount of menstruation. The endometrial lining takes 2-3 days to repair completely and the bleeding will stop at this time. However, not all people experience vaginal bleeding when a fertilized egg is laid. Only a small percentage of people will experience it, which is normal and does not require special intervention. When the fertilized egg is in the womb, the pregnant woman should pay attention to the amount and duration of vaginal bleeding. If the vaginal bleeding is heavy and lasts for a long time, it may be due to a failed fertilized egg or ectopic pregnancy and should be seen by an obstetric clinic.