Risk factors you cannot change

Risk factors you cannot change

Gender
Simply being a woman is the main risk factor for developing breast cancer. Men can
develop breast cancer, but this disease is about 100 times more common among women
than men. This is likely because men have less of the female hormones estrogen and
progesterone, which can promote breast cancer cell growth
Aging
Your risk of developing breast cancer increases as you get older. About 1 out of 8
invasive breast cancers are found in women younger than 45, while about 2 of 3 invasive
breast cancers are found in women age 55 or older.