"Less than two months after the U.S. Preventive Services Task Force (USPSTF) set off a national controversy with its revised recommendations for mammography screening, the American College of Radiology (ACR) and American Cancer Society (ACS) have issued recommendations calling for breast cancer screening to begin at age 40 and even earlier for high-risk patients." (source:  Healthimaging.com)
 
Click Here for the full article and recommendations on why annual Mammograms starting at age 40 are advisable.