If your period is delayed for more than 7 days, it may be due to pregnancy or pathological factors, so it is recommended to go to the hospital for a clear diagnosis. Menstruation is the cyclical shedding and bleeding of the endometrium that occurs with the changes of estrogen and progesterone in the body. Menstrual blood is dark red in color and it includes cervical mucus, endometrial debris, blood and shed vaginal epithelial cells. The normal menstrual cycle is 21-35 days with an average of 28 days, the period is usually 3-7 days, and the volume of menstruation is 30-80 ml. Some women have early menstruation and delayed menstruation for 1 week, which is normal. If menstruation is delayed for more than 7 days, the common causes are endocrine disorders, cold in the uterus and lack of qi and blood, etc. For women of childbearing age who are sexually active, it may also be due to pregnancy. Therefore, a delay in menstruation of no more than 7 days, except for pregnancy, is normal. If it exceeds 7 days, the patient is advised to consult a doctor for proper management.