When should young women go in for a mammogram done to detect for breast cancer?

Baseline age 35-40: There has been some debate on the utility of mammogram between age 40-50 however, the current recommendation is that after your baseline mammogram, yearly mammograms start at age 40. If you have a 1 st degree relative with breast cancer at a young age, then your mammograms start 10 years prior to their age at diagnosis. You should discuss the timing your with your doctor to decide what's best.

Mammograms: According to the American Cancer Society, American College of Radiology, and others, annual screening mammography should begin at age 40. Screening may begin sooner if you are a BRCA carrier or are otherwise at high risk.