How does this guideline differ from previous ACS guidelines?

The biggest change in the current guideline is that we now recommend that women at average risk for breast cancer start annual screening with mammogramsat age 45, instead of age 40 (which was the starting age in our previous guideline). Women ages 40 to 44 can choose to begin getting mammograms yearly if they want to.

In addition, the guideline says that women should transition to screening every 2 years starting at age 55, but can also choose to continue screening annually.

The ACS no longer recommends a clinical breast exam (CBE) as a screening method for women in the U.S. Breast self-exam is also no longer recommended as an option for women of any age.