For average-risk women, the recommended schedule is a mammogram every two years starting at age 40 and continuing through age 74. That’s the core answer, but the full picture depends on your age, risk level, and what type of exam you’re asking about. Clinical breast exams, mammograms, and self-checks each follow different guidelines.
Mammogram Schedule by Age
The U.S. Preventive Services Task Force recommends biennial (every two years) screening mammography for women aged 40 to 74. This applies to women at average risk with no symptoms. Before 2024, some guidelines suggested starting at 50, but the current recommendation brings the starting age down to 40 for everyone.
For women 75 and older, there isn’t enough evidence to make a firm recommendation either way. If you’re in that age group, the decision typically comes down to your overall health and life expectancy, discussed with your doctor.
Clinical Breast Exams at Your Doctor’s Office
A clinical breast exam is a physical exam performed by a healthcare provider, separate from a mammogram. Major organizations differ on whether these are necessary at all for average-risk women, and the USPSTF doesn’t include them in its screening recommendations.
The American College of Obstetricians and Gynecologists takes a more flexible stance: if you and your provider decide a clinical exam is worthwhile, reasonable intervals are every one to three years for women aged 25 to 39, and annually for women 40 and older. The key word is “may be offered,” not “should be done.” The evidence that clinical exams catch cancers that mammography misses is limited, so this is a conversation rather than a firm rule.
Breast Self-Exams Are No Longer Recommended
If you grew up hearing that you should do a monthly self-exam in the shower, that guidance has changed. The American Cancer Society no longer recommends routine breast self-exams for women of any age. Studies found no reduction in breast cancer deaths from regular self-exams, and they led to unnecessary biopsies from false alarms.
What is recommended instead is general breast awareness. Know how your breasts normally look and feel, and report any changes to a provider promptly. This is especially important if you notice something between scheduled mammograms. You don’t need a structured monthly ritual, but you shouldn’t ignore a new lump, skin change, or nipple discharge.
If You’re at High Risk
Women at high risk for breast cancer follow a more aggressive schedule: both a mammogram and a breast MRI every year, typically starting at age 30. The MRI is added on top of the mammogram, not as a replacement, because each catches cancers the other can miss.
You’re considered high risk if you:
- Have a lifetime breast cancer risk of roughly 20 to 25 percent or higher based on family history risk tools
- Carry a known BRCA1 or BRCA2 gene mutation
- Have a parent, sibling, or child with a BRCA mutation, even if you haven’t been tested yourself
- Received radiation therapy to the chest before age 30
- Have certain rare genetic syndromes like Li-Fraumeni or Cowden syndrome
If any of these apply to you, screening should begin at 30 and continue for as long as you’re in good health. Your provider can run a formal risk assessment to determine whether you meet the threshold.
Dense Breast Tissue
If you’ve been told you have dense breasts after a mammogram, you might wonder whether you need extra screening. Dense tissue makes mammograms harder to read and slightly raises breast cancer risk. However, ACOG does not recommend routine supplemental imaging (ultrasound or MRI) for women with dense breasts who have no other risk factors. The evidence that additional testing improves outcomes for this group alone hasn’t been established.
That said, if you have dense breasts plus other risk factors (strong family history, a known gene mutation), the high-risk protocol described above would apply. Dense breasts on their own don’t automatically change your screening schedule.
What Happens After an Abnormal Result
If a mammogram finds something that looks probably benign, your radiologist will likely recommend a follow-up imaging appointment in six months rather than waiting a full year. This shorter interval matters. Research from facilities across the United States shows that the majority of cancers in this category are caught at or right after that six-month check. Skipping it or pushing it back can mean a missed window. After the follow-up confirms stability, you typically return to your regular screening schedule.
Screening for Transgender Women
Transgender women on feminizing hormones develop breast tissue that carries some cancer risk. Current guidelines from UCSF recommend screening mammography every two years, but only once two conditions are met: age 50 or older, and at least 5 to 10 years of feminizing hormone use. A transgender woman over 50 who recently started hormones would not begin screening until that minimum hormone exposure window has passed. Some providers may discuss delaying screening until 10 years of hormone use, given the unknowns about risk in this population.
A Quick Reference
- Ages 25 to 39, average risk: Optional clinical breast exam every 1 to 3 years; no mammogram yet
- Ages 30 and up, high risk: Annual mammogram plus annual breast MRI
- Ages 40 to 74, average risk: Mammogram every 2 years; optional annual clinical exam
- Ages 75 and up: No firm recommendation; individual decision based on health status
- After an abnormal result: Follow-up imaging at 6 months