The American Cancer Society has revised its guidelines for when and how often women should receive screenings for breast cancer.
The group suggests women start yearly breast scans at age 45 instead of 40 and for healthy women to have scans every other year at ages 55-74.
Historically there has been much disagreement over the right time and frequency for mammograms.
New suggestions are more aligned with those of a US government panel.
Announced on Tuesday, the advice is aimed toward women at "average" risk for breast cancer, and doctors suggest more screening for women at higher risk.
Higher risk factors include certain genetic mutations and family history of cancer.
"The most important message of all is that a mammogram is the most effective thing that a woman can do to reduce her chance of dying from breast cancer," said Dr Richard Wender of the American Cancer Society.
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