Perimenopause: The change before the change
Perimenopause, or “menopause transition,” refers to the time leading up to the cessation of menstruation when estrogen production slows down.
It usually starts in a woman’s 40s, but can start in the 30s as well. It is a gradual process that can begin eight years before menopause (the point when the ovaries stop releasing eggs), or it may last only a few months. The average length is usually four years. More about this important issue.