There is no fastest and most effective way to promote menstruation. If menstruation is delayed due to physiological reasons, you can promote the onset of menstruation through appropriate exercise, lifestyle adjustment, etc. If menstruation is delayed due to disease, you should go to the hospital in time, clarify the cause of the disease and then be treated under the guidance of the doctor. 1. If a woman’s menstruation has been delayed recently due to mental tension, environmental changes, excessive pressure, etc., she can do appropriate exercises to relieve her physical and mental stress. You can do appropriate exercises to relieve physical and mental stress, adjust your mindset, and promote the return of the menstrual cycle to normal. 2. Excessive weight loss, poor rest, polycystic ovary syndrome, premature ovarian failure, etc. can affect the female endocrine and lead to delayed menstruation, patients need to consult a doctor in time for treatment, and at the same time in the usual with lifestyle adjustments. Usually develop good dietary habits, eat more fresh fruits and vegetables, light diet, increase the intake of high-protein foods, timely replenishment of sufficient water for the body; avoid excessive fatigue and excitement, and maintain a happy mood, which will help promote the return of the menstrual cycle to normal. 3. Some progesterone-containing drugs, such as mifepristone tablets and medroxyprogesterone tablets, can cause luteal phase prolongation, resulting in delayed menstruation. Patients need to go to the hospital to do ultrasound to check the thickness of the endometrium, according to the results of the examination, to formulate the next step of the treatment program. If the thickness of the endometrium is above 0.8cm, you can take medroxyprogesterone tablets or progesterone injection under doctor’s instruction to promote menstruation. If the female patient is not pregnant and her period does not come for a long time, it is recommended to consult a doctor in time to clarify the cause of the disease, standardize the treatment under the guidance of the doctor, and avoid blindly taking drugs.