Friday, May 20, 2005

Menstrual cycle characteristics and incidence of premenopausal breast cancer

"Overall, longer or irregular cycles at ages 18 to 22 years or in early adulthood were not associated with reduced premenopausal breast cancer risk. However, longer menstrual cycles at ages 18 to 22 years were associated with a lower incidence of premenopausal breast cancer before age 40."

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