Menstruation at the age of 53 once in half a month or so is not considered amenorrhea, it is considered frequent menstruation. The causes of frequent menstruation in 53-year-old women may be uterine fibroids, dysfunctional uterine bleeding, endometrial polyps and other gynecological diseases. 1. Uterine fibroids. If the patient has uterine fibroids, and the growth of fibroids has affected the endometrium, it will cause frequent menstruation or the symptom of heavy bleeding. 2. Dysfunctional uterine bleeding. Prevalent in middle-aged and old women, due to the imbalance of hormone levels in the body near menopause, which will easily lead to frequent menstruation. 3. Endometrial polyps. Endometrial polyps are foreign bodies that grow on the lining of the uterus. The growth of the polyps affects the lining, so they can also cause frequent menstrual periods. If a 53-year-old woman has a period that comes once every half a month, she needs to go to the hospital for a gynecological examination to determine the cause of the disease and timely treatment.