Menstruation refers to women’s menstruation, girls’ menstruation delayed within 7 days of the normal range, if delayed for more than 7 days, it is an abnormal phenomenon, need to be vigilant. Normal women’s menstrual cycle is 21 to 35 days, an average of 28 days, general menstruation within 7 days in advance or delayed within 7 days are within the normal range, once advanced or delayed more than 7 days, even if it is the menstrual period or late, are all pathological menstruation. If a woman’s period is delayed for more than 7 days, she needs to be alert to the possibility of pregnancy and consider cervical adhesions, polycystic ovary syndrome and other factors after ruling out pregnancy. In addition, irregular living habits can also cause delayed menstruation. Therefore, patients with delayed menstruation need to consult a doctor in time in order to identify the specific cause of the problem and provide targeted treatment.