Menstruation deferred more than 20 days did not come but did not have pregnant what circumstance

Menstruation delayed more than 20 days did not come but not pregnant may be endocrine disorders, drug factors, reproductive system diseases, malnutrition and other reasons. 1. endocrine disorders Women's menstrual cycle by the hypothalamic pituitary ovarian axis precise regulation, any link abnormal may cause endocrine disorders, and then lead to menstrual abnormalities. For example, long-term mental stress, overwork, irregular work and rest, environmental changes, etc. may interfere with the normal function of the endocrine system, so that the menstrual cycle changes. 2. Drug factors Some drugs may affect the menstrual cycle. For example, long-term use of contraceptives suddenly stopped, or take certain antidepressants, antipsychotics, etc., may cause menstrual delay. 3. Reproductive system diseases such as polycystic ovary syndrome, premature ovarian failure, endometritis, intrauterine adhesions, etc., these diseases will affect the ovulation function of the ovary or the normal growth and shedding of the endometrium, resulting in delayed menstruation. 4. Malnutrition Excessive dieting, severe malnutrition, etc. can lead to a lack of essential nutrients in the body, affecting hormone synthesis and metabolism, and then causing menstrual disorders. When menstruation is delayed for more than 20 days and pregnancy is ruled out, medical treatment should be sought in time for relevant examinations, such as sex hormone six items, ultrasound examination, thyroid function examination, etc., to clarify the cause, and targeted treatment should be carried out under the guidance of doctors. At the same time, attention should be paid to maintaining good living habits in daily life, including regular rest, reasonable diet, moderate exercise, stress reduction, etc., in order to maintain the stability of the endocrine system and prevent the occurrence of menstrual disorders.