Shorter and shorter menstrual cycles may be due to menopause, but endometriosis, endocrine disorders and other causes cannot be ruled out. 1. Menopause: when a woman is about 40 years old, her ovaries will gradually decline, the number of follicles will decrease, and the luteal function will decline, which may lead to shorter and shorter menstrual cycles. 2. Endometrial lesions: If a woman suffers from endometritis, endometrial polyps, etc., it may also cause shorter and shorter menstrual cycles. 3. Endocrine disorders: If the hormone level in a woman’s body is abnormal, the imbalance of estrogen and progesterone secretion may lead to shorter and shorter menstrual cycles, such as luteal insufficiency patients. If the patient’s menstrual cycle is getting shorter and shorter, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or standardized treatment.