Menopause is the cessation of menstruation, meaning a woman has not had a period for 12 consecutive months. It marks the end of a woman’s reproductive years. This period typically occurs between 45 and 55 years of age, with the average age in Australia being around 51 years. Menopause is a natural part of aging, signaling the end of the menstrual cycle due to the loss of ovarian follicular activity.