“Menopause is the period before and after a woman’s last menstrual period. It is caused by the atrophy of ovarian function and the lack of estrogen production. “Menopause” can be divided into “menopause transition”, “menopause” and “post-menopause”. 1. Transitional period of menopause: It refers to the period from abnormal menstruation due to the decline of ovarian function to menopause; generally, menstrual cycles start to become shorter in the 40s, followed by longer cycles and other irregular menstruation. Therefore, although most of the abnormal uterine bleeding is due to abnormal ovarian hormone secretion during the menopause transition, it should still be confirmed and discussed by the doctor whether treatment is needed. The most common symptoms are hot flashes, night sweats, insomnia, depression, etc. 2. Menopause: The last menstruation of women mostly occurs at the age of 45 to 52, with an average of 51 years. 3. After menopause: The production of estrogen by the ovaries stops completely, resulting in a rise in follicle-stimulating hormone (FSH) secreted by the hypothalamus-pituitary gland. Due to the lack of estrogen, the physiology begins to change significantly. 4.Menopause: The medical term menopause is a little different from what we perceive as menopause, which usually refers to a period of rg before and after menopause, ending 12 months after the last menstrual period.