Generally, menstrual disorders caused by taking birth control pills can be recovered in about 2 to 3 months, and the exact recovery time varies from person to person. Contraceptive pills are generally hormonal drugs, which contain relatively large amounts of estrogen and progesterone. Taking contraceptive pills may affect the normal hormone levels of the body, thus affecting the normal menstrual cycle and leading to menstrual disorders. Generally, menstrual disorders after taking oral contraceptives will return to normal in about 2 to 3 weeks, and the recovery time may be shorter for young, physically fit women and longer for older, physically unfit women. If menstrual disorders occur after taking oral contraceptives and there are obvious bleeding symptoms, you should go to the hospital in time, complete the relevant examinations and treat the symptoms under the guidance of the doctor.