Women whose breasts were exposed to radiation during their childhood, such as those treated for Hodgkin's disease , are at an increased risk for developing breast cancer throughout their lives. Studies show that the younger a woman was when she received her treatment, the higher her risk for developing breast cancer later in life. Reproductive and menstrual history. Women who had their first child after age 30 have a greater chance of developing breast cancer than women who had children at a younger age. The results of studies examining the use of oral contraceptives as a risk factor for breast cancer are inconsistent.
Age is the most important factor in the risk for breast cancer.
The older a woman is, the greater her chance of getting breast cancer. 1 out of 2,212 by age 40. . . 1 out of 235 by age 50. . . 1 out of 54 by age 60. . . 1 out of 23 by age 70. .