My mother had a full hysterectomy; her ovaries were removed to, a yr after having myself. So she'd have been about 32yrs old but a good 15yrs later she started exhibiting the classic signs of menopause. She saw her doctor and he confirmed she actually was starting her menopause. Apparently her doctor explained to her that your menopause is actually related to the hormones in the brain too, and had to put her or H.R.T which was a gr8 relief all round. The human body really is a weird and wonderful thing.