reporter: ashley rivera never thought she was at risk for breast cancer. when she developed stage 3 cancer at age 28, doctors began to wonder what s in her genes. nobody believed it could happen this young. reporter: turns out ashley has a mutation which dramatic raisethe risk for breast and ovarian cancers i didn t care about me at that point i have three kids at that moment that could have the gene as well reporter: now a prestigious panel of doctors recommends all survivors of breast and ovarian cancers should talk to their doctor about getting tested for the gene mutation. and so should women with ancestries prone to the mutation, the test is given to half the women who need it it is important to widen the net from just women with a family history of breast cancer to women with a personal history of breast cancer who have been successfully treated reporter: ashley is now getting screened for ovarian