Female menstruation is called great aunt, and great aunt is the common name for female menstruation in daily life. Menstruation is controlled by the endocrine function of the ovaries. Before puberty, due to the imperfect function of the ovaries, there will be no menstruation, and with the growth of age, the function of the ovaries gradually matures, secreting estrogen and progesterone to balance, and promoting the development of the secondary sex characteristics as well as the reproductive organs to make menstruation come. Normal menstrual cycle is about 28~30 days, menstruation is regular when it is delayed for about 7 days or advanced for about 7 days. Whether or not the menstrual cycle is regular is related to the ovarian endocrine function and environmental factors, disease factors, etc., and when the abnormal ovarian function leads to menstrual disorders, it is necessary to go to the hospital in time for consultation. Women will stop menstruating when they get pregnant, wait until normal delivery during breastfeeding may experience amenorrhea or irregular menstruation, and resume normal menstrual cycle after stopping breastfeeding.After 45 years old, women gradually enter menopause and experience menstrual disorders, and enter menopausal age around 50 years old, which also leads to the termination of menstruation. If severe dysmenorrhea, heavy bleeding and other discomforts occur during menstruation, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease, and then follow the doctor’s instructions to deal with the treatment.