Menopause is the point at which a woman stops ovulating and menstruation ceases, indicating the end of fertility. As a normal event, menopause is usually confirmed when a woman has not had a menstrual period for 12 consecutive months. Most women experience menopause between the ages of 40 and 58, with the average at about age 51. Symptoms can start occurring several years prior actually entering menopause. This stage is called peri-menopause.