How can I protect my daughter, both of her grandmas had breast cancer

Depending on the specific type of breast cancer each grandma had, your daughter may or may not be at higher risk of getting the disease. A good place to start would be genetic counseling and comprehensive genetic testing. This would take into account ALL cancers in the family. When it comes to breast cancer in general, other risk factors may put her at higher risk. A conversation with her doctor should yield recommendations based on the full picture. Great job, mom, for being proactive. #askyourgyno