The last natural menstrual period (so often a retrospective diagnosis); hence the adjective menopausal, the natural state a woman is in after the ovaries have stopped ovulating because of depletion of eggs. The normal age of menopause is between 40 and 55 years, with an average in Western societies of 50-51 years. See also perimenopause, premature menopause, oopause and estrone
