A transition time during which menstrual periods can become irregular and symptoms of menopause may be experienced prior to menopause. On average, the onset of perimenopause occurs around age 47 and the average duration is 4-5 years. It is increasingly seen in women even up to 12-15 years before menopause. An array of physical, mental and emotional symptoms can occur during this time. Also: Perimenopausal

	Osteoporosis - Osteopenia Recommendation Soy Isoflavones (genistein, daidzein) "...5217-5221] A one-month of treatment with a soy isoflavone extract reduced the excretion of bone resorption markers, in a placebo-controlled study of 23 healthy perimenopausal women..." Perimenopausal Issues The Condition "If the average American woman enters menopause around age 52, and if perimenopause can begin as early as age 35 when hormonal changes are first noticeable, then we have a 10 to 17 year period when a woman is considerably vulnerable to the effects of hormone changes..."

Last updated: May 10, 2007