World Of Football - BRCA Breast Cancer Gene Doesn't Affect Survival BRCA mutations are inherited and increase the risk of breast and ovarian cancers. Between 45 percent and 90 percent of women with a BRCA mutation develop breast cancer, compared with about 12.5 percent of women in the general population. Source: MedMD Sat, 13 Jan 2018 01:11:22 UTC en