Two weeks ago I turned 30, with a lot on my mind – excelling at work, furnishing a new apartment, wondering “Why does my lower back suddenly ache?” That kind of stuff. Perhaps the last question on my mind was, “What age should I schedule a mammogram?”

Still 10 years away from 40, I didn’t feel much urgency to even think about mammograms. But, after speaking with a friend who was recently diagnosed with breast cancer – she’s 37 – my feelings have changed. October is National Breast Cancer Awareness Month, and you’ve no doubt already seen the pink campaigns around – for good reason. Breast cancer is the most common cancer in American women, excluding skin cancers, and the average risk of a woman getting breast cancer sometime in her life is about 13 percent, according to the American Cancer Society.