Women at average risk of breast cancer are now generally advised to start mammogram screening at age 40, with the exact schedule (every year vs every two years) decided with their doctor.

Key age recommendations

  • Many expert groups now say women at average risk should begin screening mammograms at 40 rather than 50.
  • The U.S. Preventive Services Task Force recommends a mammogram every 2 years from age 40 to 74 for average‑risk women.
  • Other organizations (like major radiology and cancer societies) favor yearly mammograms starting at 40, especially if you are comfortable with more frequent screening.

How often to get them

  • Biennial (every 2 years) screening from 40–74 is considered an acceptable minimum for average‑risk women.
  • Some guidelines suggest annual mammograms from 40–54, then every 1–2 years after 55 as long as you are in good health and expected to live at least 10 more years.
  • After the mid‑70s, continuing screening is an individualized decision based on health, life expectancy, and personal preferences.

If you are higher risk

  • Women with strong family history, known BRCA or other gene mutations, prior chest radiation, or certain high‑risk breast conditions are often advised to start earlier (sometimes as early as 30) and may add MRI to yearly mammograms.
  • These higher‑risk schedules are not one‑size‑fits‑all and should be set with a breast specialist or knowledgeable primary doctor.

Why recommendations changed recently

  • Rising rates of invasive breast cancer in women in their 40s and new data showing greater net benefit from earlier screening led groups to lower the starting age to 40.
  • Experts also hope that a clearer age‑40 start helps reduce confusion and improves equity in who gets screened on time.

Practical “what should I do?”

  • If you are 40–74 and at average risk, talk with your clinician about starting (or continuing) regular screening now, choosing yearly vs every other year based on your values and anxiety about false alarms.
  • If you are under 40 but have a strong family history or other concerns, ask specifically whether you qualify for earlier mammograms or MRI and whether you should have a formal breast cancer risk assessment.

Information gathered from public forums or data available on the internet and portrayed here.