Origin and Etymology of is. Middle English, from Old English; akin to Old High German ist is (from sÄ«n to be), Latin est (from esse to be), Greek esti (from einai to be)
For the medical journal, see Menopause (journal). Menopause, also known as the climacteric, is the time in most women's lives when menstrual periods stop permanently, and they are no longer able to bear children. Menopause typically occurs between 49 and 52 years of age.
There are different phases of the climacteric that a woman experiences: 1  Perimenopause is the transitional phase when hormone levels begin to drop. This phase lasts typically 3 to 5 years but can last up to 10 years. 2  Menopause is the permanent cessation of menstruation.