The causes of delayed menstruation at the age of 49 may be amenorrhea, mental factors, medication side effects and cervical adhesions. It is recommended to consult a doctor in time to find out the cause and treat it under the doctor’s guidance. 1. Amenorrhea: When menstruation is delayed at the age of 49, it is possible that amenorrhea has occurred. Women usually enter menopause around the age of 45-55 and experience amenorrhea. 2. Mental factors: If the spirit is always in a state of tension, and sometimes feel upset, these emotions will undoubtedly affect the menstruation, resulting in delayed menstruation. 3. medication side effects: some women who take birth control pills for a long time will affect their own hormone levels, resulting in endocrine disorders, which may occur at the age of 49 delayed menstruation phenomenon. 4. Cervical adhesion: If a woman has previously undergone uterine surgery, then it may cause cervical adhesion, in which case it is easy to lead to menstrual blood retention, manifested in delayed menstruation. There are many reasons for delayed menstruation at the age of 49, and it is recommended that the patient go to the hospital and follow the doctor’s instructions to improve the relevant examination and treatment.