Age
When you age, the risk of breast cancer increases. Approximately 77 percent of females diagnosed with breast cancer are 50 years old or above, and 65 percent are over 40. There is a 1 in 68 chance of developing breast cancer in women ages 40 to 50 years. It’s one in 28, from 60 to 70. And it is 1 in 26 in women 70 and older.