I started at 12 and am now at least three years past the average age of menapause. However, on my last pap my doctor was kind enough to tell me that my ovaries felt like "two small raisons" which gives me hope that I will not have a period in the near future. However, since i bought the Viva cup just last year, and am beyond the definition of frugal; I figure I'll be menstruating well into my seventieth year...just because that the kind of karma I have.