Aunt refers to menstruation. Delayed menstruation mainly includes physiological factors, uterine disease factors, ovarian function factors, other factors and so on. 1. Physiological factors: menstruation can be affected by a variety of factors, if there is a delay in menstruation first of all need to rule out whether there is pregnancy; if in the breastfeeding period, there will be a delay in menstruation; if the woman has reached menopause, then there will be a delay in menstruation; there are also menstruation will be affected by psychological factors, emotional factors, nutritional deficiencies and other reasons. 2. Uterine disease factors: if the patient has a thin uterine lining, uterine adhesions, congenital uterine developmental abnormalities and other diseases, can also lead to delayed menstruation. 3. Ovarian factors: if the patient has premature ovarian failure, it will also lead to delayed menstruation. 4. Other factors: If the patient also suffers from other endocrine diseases, such as hypothyroidism, hyperprolactinemia, etc., it can also lead to delayed menstruation. If the patient’s menstruation is delayed for a long period of time, or the symptoms persist and do not get better, the patient should go to the hospital in time for treatment.