Your responses indicate that you are experiencing natural menopause. The average age of natural menopause is 51 years, but normal natural menopause can occur anytime from ages 46 to 55 years. Natural menopause can be triggered by several hormonal changes, including a permanent cessation of menses due to loss of ovarian function and 12 consecutive months without having a period with Final menstrual period (FMP) defined retrospectively.