A 40-year-old woman who has a precursor to menopause will generally have a low menstrual flow, which decreases gradually, not all at once. If the menstrual flow decreases gradually and the cycle becomes longer, some will come once every two months or once every three months, then this situation is considered to be a precursor of menopause in women. Once this happens, the first thing to do is to go to the hospital for a checkup, because it is not normal to have this condition at the age of 40. Under normal circumstances, the average age of menopause in China is around 49 years old, and if the precursor of amenorrhea occurs at this age, it is not normal. If you have a premenopausal sign at this age, it is not normal. Then you must go to the hospital to have a sex hormone test to see if your ovarian function is indeed premenopausal. If there is indeed a precursor to amenorrhea, there is indeed an endocrine disorder, we must do the appropriate treatment, if it indicates that the ovarian function has declined, may be a problem to adjust. If it is not a decline, but an endocrine disorder that causes low menstrual flow and delayed menstruation, you can treat the symptoms. If the amenorrhea is really caused by ovarian decline, the ovarian function is already in decline, so you need to supplement some Chinese medicine to regulate it. Therefore, if a 40-year-old woman has low menstrual flow and delayed menstruation, it suggests the possibility of amenorrhea.