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Lifetime chance of getting breast cancer Overall, the average risk of a woman in the United States developing breast cancer sometime in her life is about 13%. This means there is a 1 in 8 chance she will develop breast cancer. This also means there is a 7 in 8 chance she will never have the disease.
Read more at https://www.cancer.org/cancer/types/breast-cancer/about/how-common-is-breast-cancer.html#:~:text=younger%20than%2045.-,Lifetime%20chance%20of%20getting%20breast%20cancer,will%20never%20have%20the%20disease.