Shorter menstrual cycles in menopausal women may be normal, but they may also be caused by some diseases. Perimenopause should refer to the perimenopausal period. During the perimenopausal period, women are prone to menstrual disorders when their follicles are less sensitive to follicle-producing hormone, which results in higher levels of follicle-producing hormone, and when the level of oestrogen in the body fluctuates more widely. 1. During the perimenopausal period, menstrual disorders are a common symptom, mainly due to sporadic ovulation or no ovulation, which is mainly manifested by irregular menstrual cycles, long duration of menstruation, and increase or decrease in menstrual flow. If the menstrual cycle is shortened and there is no abnormality in all aspects of the examination, it means that this is a normal phenomenon. 2. When perimenopausal women experience shortened menstrual cycles, some pathologic factors should be ruled out first, such as uterine fibroids, endometrial polyps, endometrial lesions, and so on. It is recommended that menopausal women with abnormal menstruation should consult a doctor for examination and treatment.