Menstruation is the common name for menstruation. The absence of menstruation for more than a month may be caused by pregnancy, endocrine disorders, ovarian failure, etc. Measures such as human chorionic gonadotropin test, endocrine regulation and estrogen-progestin replacement therapy need to be taken accordingly. 1. Pregnancy: If you have normal sexual life, you need to determine whether you are pregnant through early pregnancy test and blood test for human chorionic gonadotropin. 2. Endocrine disorders: anxiety, stress and other conditions may lead to endocrine disorders, thus delaying menstruation, which need to be treated by oral progesterone capsules, and are prohibited for people with serious liver and kidney diseases. 3. Decline in ovarian function: when women are older or in perimenopause, the decline in ovarian function leads to abnormal hormone secretion and thus no menstruation, and estrogen-progestin replacement therapy is needed after diagnosis. When a woman does not have menstruation for more than a month, she should not take medication without authorization, and should consult a doctor for diagnosis in a timely manner.