Menapause after hystorectomy?

If ovaries removed: A woman will go into chemical menopause if both ovaries are removed at the time of hysterectomy. If one or both ovaries are left, then a woman will enter menopause at the natural time (average is at 51 years of age).

Depends: If the ovaries are removed at the same time as the uterus, a woman will suddenly begin menopause. If one or both ovaries are still functioning (premenopause) and they are not removed, a woman should not go into menopause until approximately the same time she would have anyway with natural menopause. That's an average age of 51, but with a lot of variability.