Menopause
The menopause transition typically begins between 40 and 50 years of age (average 47.5). The duration of perimenopause may be for up to eight years. Women will often, but not always, start these transitions (perimenopause and menopause) about the same time as their mother did.
North American Menopause Society
NAMS also releases consumer educational materials such as the print resource "The Menopause Guidebook" and the e-mail newsletter "Menopause Flashes". Other educational resources related to menopause can be found at the NAMS website menopause.org.