If the woman is 20, her probability of developing breast cancer in the next 10 years is 1 in 2,500. At age 30, this possibility increases to 1 in 250 over the next 10 years. If aged 40, there is a 1 in 67 chance that a woman will develop breast cancer over the next 10 years. From ages 50 to 60, there is a 1 in 30 chance of developing breast cancer. From ages 60 to 70, there is a 1 in 29 chance of developing breast cancer.
Blood relatives can be from either the mother's or father's side of the family.
Although the exact risk is not known, women with a family history of breast cancer in male family members also have an increased risk of breast cancer. Mammograms are unsafe and painful. Mammograms give only minimal exposure to radiation, so they are safe. Having fibrocystic breast disease increases your risk of cancer. This belief was thought to have some credibility in the past.