45-year-old menstruation delayed nearly 20 days did not come may be pregnancy, irregular menstruation, ovarian failure and other causes, can be observed, drugs to regulate its discomfort. 1. pregnancy: 45-year-old woman menstruation delayed 20 days did not come may be pregnant, after pregnancy the body of the hormone level increases, the endometrium will not occur for the time being cycle peeling, menstruation will not come for the time being, belong to the physiological phenomenon, according to their own situation to consider the continuation of the pregnancy or termination of the pregnancy treatment. 2. Irregular menstruation: 45-year-old women due to mental stress, excessive dieting, weight loss and other reasons for irregular menstruation, menstruation may also be delayed for 20 days, such patients can go to the hospital to do ultrasound, hormone six examination, and then according to the situation, choose estradiol dextroprogesterone tablets, progesterone, and other estrogen and progesterone to regulate the body. 3. Ovarian function decline: women aged 45 to 55 years old will enter the menopause stage, 45-year-old women’s ovarian function has declined, hormone regulation imbalance may cause menstruation delayed for 20 days to come, you can cycle the application of estrogen stimulating progesterone drugs, so that menstruation cycle, such as estradiol cyclopropylprednisolone tablets composite packaging, so that the menstruation to come. There are more reasons for a 45-year-old woman’s menstrual period not coming for 20 days, and it is recommended to consult a doctor in time for serious cases to clarify the cause of the disease and then treat the symptoms, so as not to cause danger.