There are certain risk factors that mean you're more likely to develop breast cancer.
Some risk factors will increase your odds significantly, others will only matter slightly.
Having risk factors doesn't tell doctors everything. Some women who have one more risk factors never develop breast cancer. Meanwhile, some women with no risk factors may develop the disease.
"It is just one of those things. It's like any other cancer, 1/3 of the women had no risk factors. We just don't know why," said Dr. Doug Winjum of Bryan Health.
You can change behaviors like smoking drinking and diet to reduce your risk. It's common knowledge that smoking cigarettes, heavy drinking and being overweight can make you more likely to develop breast cancer.
Factors like age, race or sex can't be changed. You also can't change your genetic makeup and family history. The American Cancer Society says that family history plays a role in 5-10% in breast cancer cases.
If a women has a close relative, like a mother or sister that has breast cancer, then that woman's risk of developing the disease is doubled.
Simply being a woman is the main risk factor for developing the disease. Your risk of developing breast cancer increases as your age.