Breast Cancer

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Risk Factors


Most women who develop breast cancer have no identifiable risk factors other than their gender. The condition is 100 times more common in women. The growth of breast cancer tumors is often affected by the presence of estrogen and progesterone. The following risk factors result from exposure to these hormones:

Age (over age 50)
First pregnancy after age 30
Long-term synthetic hormone replacement therapy (HRT)
Menstruation before age 12
Menopause after age 50
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