Surgical menopause
Besides natural menopause, clinical intervention can also end the reproductive cycle in women.

When the ovaries of a woman are surgically removed (oophorectomy), the woman would immediately be in the "surgical menopause" stage.

In partial hysterectomy (when only the uterus is removed), even though menstruation has ended, the ovaries continue to function

In this case, menopause will not occur until the ovulation cycle ends.