Sudden bleeding after seven days of delayed menstruation does not exclude the possibility of miscarriage, but may also be menstrual, ectopic pregnancy and so on. 1. Miscarriage: If you usually have regular menstruation, have normal sex life, do not take safe and effective contraceptive measures, and then suddenly bleed after 7 days of delayed menstruation, positive urine pregnancy test or blood HCG value is higher than the normal value of the obvious, consider that there is a pre-eclampsia situation. If there is a request for continuation of pregnancy, it is necessary to carry out abortion preservation treatment. 2. Normal menstruation: If women who usually take safe and effective contraceptive measures or do not have sex suddenly bleed after 7 days of delayed menstruation, with negative urine test or no elevation of HCG, it is a normal menstruation and does not need to be treated. 3. Ectopic pregnancy: If you have sex without safe contraception, and your period is delayed for 7 days and you experience vaginal bleeding accompanied by abdominal pain, the possibility of ectopic pregnancy cannot be ruled out, and you need to do a good blood HCG and ultrasound examination to make a clear diagnosis. After excluding normal menstruation, you need to go to the hospital in time to clarify the cause of the disease and treat the cause of the disease.