Your first mammogram: what actually happens, and how to prepare
A plain-language walkthrough of screening mammograms — timing, comfort, results, and when to add ultrasound or MRI.
Screening mammograms are the single most effective tool for catching breast cancer early. Most women should start between 40 and 50, depending on risk and country. In Canada you can usually self-refer through your provincial program.
Practical tips
- Book for the week after your period — breasts are less tender.
- Skip deodorant, lotion, and powder on the day. They can show up as artifacts.
- Bring prior images if you've had a mammogram elsewhere — comparison matters.
- It takes about 20 minutes. The compression is brief, not damaging.
Dense breasts
If your report notes 'dense breast tissue,' ask about supplemental screening ultrasound. Dense tissue makes both cancer and cancer risk higher — and easier to miss on mammograms alone.
This is not medical advice. Clinic Compass is an educational tool to help you prepare for a walk-in visit. It does not create a doctor–patient relationship, does not diagnose or treat any condition, and is not a substitute for the judgement of a licensed healthcare professional who knows your history. Never delay, avoid, or change medical care because of something you read here. In an emergency, call 911 or your local emergency number.
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