Perimenopause: Ups and downs can last years

... What shapes a woman's reality -- how she sees the world, how she relates to the people in her life, and how she feels about herself? Contrary to what you may think, the rockiest time isn't age 12, with the fresh flood of hormones, or age 51, the average age of menopause, according to neuropsychiatrist Louann Brizendine. It's those years before a woman enters menopause.

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