Period is also known as menstruation, menstruation delayed 7 days see red may be menstruation, may also be pregnant, can not be based on simple bleeding to determine pregnancy or menstruation. If you have vaginal bleeding after 7 days of delayed menstruation, you should go to the hospital for a blood test for HCG, urine pregnancy test, ultrasound and other tests to determine whether you are pregnant or not, and simple bleeding is not enough to determine whether the bleeding is caused by pregnancy. Bleeding after pregnancy may be caused by fertilized egg implantation, pre-miscarriage, ectopic pregnancy, etc. The specifics should be determined by examination. Vaginal bleeding after 7 days of delayed menstruation may be menstruation, menstruation is usually bleeding 3~5 days clean, bleeding volume of 30~50ml or so, observation is almost the same as the usual menstrual bleeding, it may be the onset of menstruation, but it is not absolute. Women of childbearing age who have a healthy sex life and have vaginal bleeding after 7 days of delayed menstruation need to go to the hospital in time, and under the guidance of a professional doctor to carry out relevant examinations to clarify whether it is the onset of menstruation or early pregnancy bleeding.