How often should women aged 55 and older undergo screening mammograms?

Women aged 55 and older are generally recommended to undergo screening mammograms every two years. This guideline is based on research indicating that biennial screening is effective at detecting breast cancer while also reducing the potential for overdiagnosis and unnecessary procedures that can occur with more frequent screenings.

The decision to start screening at age 40 and the frequency of screening are influenced by factors such as individual risk factors and preferences. However, for women in this age group, the recommendation to screen biennially strikes a balance between the benefits of early detection and the risks associated with continued screening. As women's breast tissue changes with age, this frequency is considered appropriate to maintain a focus on health and efficacy.