Menopause is the time in a woman’s life when she stops menstruating. Natural menopause is genetically pre-determined and typically occurs between the ages of 48 and 52. However, some women will go through menopause at an earlier or later age. Menopause is a normal, biological event that all women experience. Once a woman reaches menopause, she can no longer bear children.
Before menstruation stops completely at menopause, most women will go through pre-menopause and peri-menopause. During pre-menopause, menstrual periods begin to become irregular. During peri-menopause, menstrual periods often become highly irregular and women may experience symptoms of menopause, such as hot flashes, vaginal dryness, or sleep disturbances.
Peri-menopause occurs a few years before a woman reaches menopause. Once a woman reaches menopause, menstruation will stop forever unless she takes hormone replacement therapy.
(“Menopause”. Imaginis. <http://www.imaginis.com>)