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You’re short. Scientists haven’t figured out why, but taller women have a slightly higher risk.You began menstruating after age 11.You haven’t used hormone-replacement therapy for longer
than five years.You’ve given birth, especially before
age 30.You breast-fed for
at least six months.You’re a man. (But the American Cancer Society estimates that 1,720 American men will be diagnosed with breast cancer in 2006.)You have less
than one alcoholic drink a day.You’re not currently taking birth control pills.You maintain a healthy weight.You exercise regularly.