01/12/2026
Breast cancer can be influenced by many factors, including genetics. While most cases are not directly inherited, about 5–10% of breast cancers are linked to genetic mutations passed down through families. The most well-known are changes in the BRCA1 and BRCA2 genes, which can significantly increase the risk of developing breast and ovarian cancer.
Having a family history of breast cancer doesn’t always mean you will develop it, but it does raise your risk. Other factors—such as age, lifestyle, and environment—also play important roles. Genetic testing and counseling can help identify whether you carry mutations that increase your risk, giving you the opportunity to take preventive steps and monitor your health more closely.