How to Prepare for a Mammogram or Breast Screening Appointment

A mammogram is an X-ray of the breast used to screen for breast cancer before symptoms develop, or to investigate a specific concern your GP or gynaecologist has identified. It is one of the most effective tools available for detecting breast cancer early — when it is most treatable — yet it is also an appointment that many women approach with significant anxiety, often without a clear idea of what to expect or how to prepare.

This guide covers everything you need to know before your mammogram appointment: when to schedule it, what to do (and not do) on the day, what to bring, what the procedure actually involves, how to understand your results, and what happens if a follow-up is needed.

Whether this is your first mammogram, a routine screening, or a diagnostic appointment following a referral from your GP, the preparation steps are the same — and knowing them in advance reduces uncertainty and makes the experience significantly less stressful.

1. When to Schedule Your Mammogram

If you menstruate, the timing of your mammogram within your cycle matters. Breast tissue is most dense and tender in the week before your period (the luteal phase). Scheduling your mammogram for days 7–14 of your cycle — the week after your period ends — means your breasts are typically at their least tender and least dense, making compression more comfortable and the images clearer.

If you are post-menopausal, cycle timing is not relevant and you can schedule at any time.

Other scheduling considerations:

• Do not schedule during a breast infection or mastitis — wait until the infection has fully resolved
• If you are breastfeeding — mammograms can be performed but images may be less clear due to milk content. In most cases, your GP or breast clinic will advise on whether to proceed or delay
• If you have breast implants — inform the radiology centre when booking. Additional implant displacement views are required, and the procedure takes slightly longer

2. What Not to Wear or Apply on the Day

This is the preparation step most commonly overlooked — and the one most likely to require rescheduling if missed:

• No deodorant or antiperspirant — the aluminium compounds in these products appear as white specks on mammogram images that can resemble calcifications. Do not apply to your underarms or chest on the morning of your appointment. If you forget, the radiology centre can usually provide wipes to remove it.
• No talcum powder — same reason as deodorant
• No body lotion or moisturiser on the chest or underarms
• No perfume on the chest area

What to wear: A two-piece outfit (top and bottom separately, not a dress or jumpsuit) so you only need to remove your top and bra. The rest of your clothes remain on throughout. Comfortable, easily removed tops are ideal.

3. What to Bring

• Previous mammogram films or images — if you have had a mammogram at a different centre before, request that the images be transferred electronically or bring a disc. Radiologists need to compare new images against your previous baseline; without prior images, any finding looks new even if it has been stable for years.
• Referral letter or booking confirmation — from your GP or specialist
• List of current medications and relevant supplements — particularly hormone replacement therapy (HRT), oral contraceptive pills, or any hormone-containing medications, as these affect breast density
• Your CHAS card (Singapore) / Medicare card (Australia) / Insurance card and referral (US) for subsidy or coverage processing
• A record of any breast symptoms — lumps or thickening you have noticed, nipple discharge, skin changes, pain — and when you first noticed them
• Written questions for the radiologist or breast nurse if you have concerns

If you have noticed any breast changes in recent months, keeping a brief log in a health journal can help you give the radiologist accurate details about timing and character. A health journal with dated pages works well for tracking symptoms and recording questions before the appointment. (Affiliate link — we may earn a small commission at no extra cost to you.)

4. What Happens During the Appointment

The entire mammogram procedure typically takes 15–20 minutes. Here is a step-by-step account of what to expect:

1. You will be asked to undress from the waist up and given a gown to wear
2. The radiographer — a trained imaging professional — will position your breast on the mammogram platform. The radiographer is trained to do this respectfully and professionally; you can tell them if you need more time or a different approach at any point
3. A compression paddle lowers onto your breast to flatten the tissue. This is held for a few seconds while the X-ray is taken. You may be asked to hold your breath briefly
4. Two views are taken per breast: a top-down view (CC view) and an angled side view (MLO view). That is four images in total for a standard screening mammogram
5. If additional views are needed on the day, the radiographer will take these before you leave — this does not mean something is wrong; it often means an area needs a clearer image

The compression is the most uncomfortable part. It lasts only a few seconds per image and is firm but not dangerous. If you find it very painful, tell the radiographer — they can adjust the compression while maintaining image quality.

5. Understanding Your Results

Mammogram results in Singapore and internationally are often reported using the BI-RADS classification (Breast Imaging Reporting and Data System):

• BI-RADS 0: Incomplete — additional imaging needed. Very common after a first mammogram.
• BI-RADS 1: Negative — no abnormality found. Routine annual or biennial screening recommended.
• BI-RADS 2: Benign finding — confirmed non-cancerous (e.g., a simple cyst). Routine screening recommended.
• BI-RADS 3: Probably benign — short-term follow-up (6-month interval) recommended to confirm stability
• BI-RADS 4: Suspicious — biopsy is usually recommended
• BI-RADS 5: Highly suggestive of malignancy — biopsy strongly recommended
• BI-RADS 6: Known biopsy-proven malignancy — used to track a known cancer during treatment

If you are called back after screening (BI-RADS 0), do not assume cancer. Approximately 10% of first-time screening mammograms result in a callback, and the vast majority of those callbacks result in a BI-RADS 1 or 2 after the additional views.

6. Mammogram Access and Subsidies by Region

Singapore: Under the Screen for Life programme, mammograms are subsidised for women aged 40 and above at polyclinics and CHAS GP clinics. Fees depend on your CHAS category: Pioneer/Merdeka Generation — free; Orange CHAS — SGD 5; Blue CHAS — SGD 15; Medishield Life eligible — SGD 50 with Medisave use. Private radiology centres charge SGD 150–300. BreastScreen Singapore runs subsidised mobile screening for women aged 40–69 who have not been screened in two years.

Australia: BreastScreen Australia provides free mammograms every two years to women aged 50–74 at no cost, with invitation letters sent by the national register. Women aged 40–49 and 75+ can self-refer and attend at no charge. Private mammograms are available at radiology clinics with partial Medicare rebate if referred by a GP.

United States: The US Preventive Services Task Force (USPSTF) recommends biennial mammograms for women aged 40–74. Under the Affordable Care Act, mammograms are covered without cost-sharing by most insurance plans for women 40+ when performed as preventive screening. Low-income women without insurance may access free or low-cost mammograms through the National Breast and Cervical Cancer Early Detection Program (NBCCEDP).

7. Questions to Ask at Your Appointment

• When and how will I receive my results?
• Will my referring doctor receive a copy, or do I need to arrange that?
• What does my breast density mean for my future screening plan?
• If I have dense breast tissue, is supplemental ultrasound screening recommended?
• Are there any findings on today’s images I should know about immediately?
• If I am called back for additional views, how quickly will that happen?
• Based on my family history, is my current screening interval appropriate?

This content is for general preparation purposes only and does not constitute medical advice. Always follow the guidance of your own healthcare provider. In an emergency, call 995 (Singapore), 000 (Australia), 911 (US/Canada), or 111 (New Zealand). Full Medical Disclaimer