Breastfeeding and Mammograms in Ajax

Can you have a mammogram while you are breastfeeding? It is one of the more common questions people bring to the front desk, and the honest answer is that it depends on why the mammogram is being done. A routine screening mammogram and a mammogram ordered to look at a specific concern are two different situations, and breastfeeding affects each of them a little differently.

This article walks through what nursing does to breast tissue, how that can change the pictures, what you can do on the day to make the examination easier, and which decisions belong with your doctor, midwife or nurse practitioner. It is written for patients across Ajax, Pickering and Whitby who are feeding a baby, pumping, or have recently weaned, and who want to understand their options before they book.

Why lactating breasts look different on an X-ray

A mammogram is a low-dose X-ray picture of the breast. On those pictures, fatty tissue appears darker and the glandular tissue, the part that makes and carries milk, appears lighter. A radiologist looks for small differences in shape, outline and texture against that background.

During pregnancy and while you are producing milk, the glandular tissue grows and becomes much more active. Milk ducts fill and the breast becomes firmer and fuller. On a mammogram, that means more of the image appears light, which is similar to what happens with naturally dense breasts. If you want to understand density in more detail, our article on breast density on a mammogram report covers it, so we will not repeat it here.

The practical effect is simple: when there is more light-appearing tissue, small findings can be harder to separate from normal tissue. A mammogram during breastfeeding is not impossible or unsafe, but it can be less clear than one done when the breast is not producing milk. That is the main reason timing is discussed so often.

Screening versus a specific concern

The most useful thing you can do before booking is work out which situation you are in.

If you are due for routine screening

Routine screening is for people with no symptoms. In Ontario, women aged 40 to 74 can self-book screening through the Ontario Breast Screening Program (OBSP) without a referral, and our Ajax clinic is OBSP-registered. Our OBSP screening guide explains how self-booking works.

If you are breastfeeding when your screening comes due, it is reasonable to pause and ask your health-care provider whether to go ahead now or wait. Some providers suggest postponing routine screening until some time after you have finished nursing, so the tissue has had a chance to settle and the images are clearer. Others may prefer you go ahead, especially if you have a higher personal risk or a long gap since your last mammogram. There is no single answer that fits everyone, and it is a conversation worth having rather than a rule we can set for you.

If you have noticed a change

A new lump, a lump that does not go away after feeds, skin changes, a nipple that has newly turned inward, or bloody discharge should not wait until you have weaned. Breastfeeding is a common time to notice lumps, and many of them turn out to be related to milk, such as a blocked duct, but anything that persists deserves a proper assessment. Contact your health-care provider promptly. Our article on next steps after finding a breast lump explains the general path from the first appointment to imaging.

For people who are nursing, providers often begin with a breast ultrasound, which uses sound waves and handles milk-filled tissue well. A diagnostic mammogram may be added depending on age, the findings and the provider’s judgment. That sequence is decided by your provider, not by the imaging clinic.

Mastitis and other symptoms that need attention sooner

Not every breast change during breastfeeding is a question for imaging. Painful, red, warm areas of the breast, especially with fever, chills or flu-like aches, can be signs of mastitis or an infection that needs medical care. Do not wait for a mammogram appointment if you feel unwell. Contact your health-care provider the same day, and if you feel very sick, have a high fever that is not settling, or are getting worse quickly, go to an emergency department or call 911.

If a red, painful area does not improve as expected after treatment, your provider may decide that imaging is the next step. Again, ultrasound is often the first test used in that situation.

Getting ready for a mammogram while nursing

If you and your provider decide to go ahead, a little planning makes a real difference to both comfort and image quality.

Empty the breasts shortly before

Nursing your baby or pumping shortly before your appointment reduces the amount of milk in the breast. That tends to make compression more comfortable and can help the images by reducing how full the tissue is. If your baby is coming with you, you may be able to feed in the car or in the waiting area just before you are called in. If you pump, bring your pump and a container, and allow yourself a few extra minutes. Call the clinic ahead if you would like to ask where you can feed or pump comfortably.

Plan the trip around feeds

A mammogram itself is short, but you should allow time for check-in and changing. Booking soon after a usual feeding time works well for many parents. Our clinic is open Monday to Friday from 9:00am to 5:00pm and Saturday from 8:00am to 3:30pm, and Saturday mornings can be easier if a partner or family member can come along to hold the baby. Free parking and ground-floor access help when you are juggling a car seat or stroller.

Dress for easy changing

The usual mammography preparation still applies:

• Skip deodorant, antiperspirant, powder and creams on your chest and underarms that day, because they can show up on the pictures.
• Wear a two-piece outfit so you only need to remove your top.
• A nursing bra and a top that opens easily make it simpler to feed or pump just before the examination.
• Bring breast pads in case of leaking, and a spare top if that would make you feel more comfortable.

Our article on what to wear for imaging has more ideas on clothing.

Tell the technologist

Let the technologist know you are breastfeeding, how recently you fed or pumped, and whether you have any sore or tender areas. If you are having a diagnostic examination, point to the exact spot you or your provider are concerned about. It can be helpful to bring the name of your provider and any requisition you were given.

What the examination feels like when your breasts are full

Compression is part of every mammogram. The plate presses the breast flatter for a few seconds so the tissue spreads out and the picture is sharp. When the breasts are full or tender from milk, that pressure can feel more noticeable than it would otherwise. Emptying the breast first helps. So does speaking up during the exam. The technologist can explain each step and pause if you need a moment, and you can tell them if something is painful.

A little milk may leak during or after compression. That is normal and nothing to feel embarrassed about. The technologist will have tissues and will be used to it.

Common worries, answered plainly

A few questions come up again and again from parents who are nursing.

1. Will the X-ray affect my milk? A mammogram does not make breast milk radioactive, and there is generally no need to stop nursing or discard milk afterwards. You can feed your baby as usual after the examination. If you have any specific concerns, ask your provider before the appointment.
2. Is there any reason to stop breastfeeding before a mammogram? Not usually for the X-ray itself. Decisions about weaning are personal and medical, and they belong with you and your health-care provider, not with the imaging schedule.
3. What if I am asked to come back? Being called back for more pictures, or for a breast ultrasound, is not unusual and happens more often when tissue is dense, which is the case during lactation. A recall means the radiologist wants a clearer look, not that something has been found. The article on breast ultrasound after a mammogram explains why the two tests are often paired.
4. Does a contrast agent or medication change anything? A standard screening or diagnostic mammogram does not involve an injection. If your provider orders a different breast test that uses contrast, ask them specifically about breastfeeding, because the advice can differ by test.

After you have weaned

Once you have finished nursing, the breast tissue gradually changes back over a period of months. Many people find that their first mammogram after weaning is more comfortable, and the pictures can be clearer. If you postponed routine screening while breastfeeding, put a reminder in your calendar to revisit it with your provider once you have finished. It is easy for a postponed appointment to slip by in the busy year after a new baby arrives.

If you are aged 40 to 74 and have no symptoms, you can book that screening directly through our clinic. If you are younger, have a strong family history, or have had previous breast concerns, ask your provider which kind of imaging and timing is right for you before booking.

A short checklist for the day

If you are going ahead with a mammogram while nursing, here is a quick summary to keep on your phone:

• Confirm with your provider whether this is screening or a diagnostic examination.
• Feed or pump shortly before your appointment time.
• Skip deodorant, antiperspirant and powder; wear a two-piece outfit and a nursing bra.
• Bring your health card, any requisition, breast pads and your pump if you use one.
• Tell the technologist you are breastfeeding and point out any tender or concerning area.
• Feed as usual afterwards.

Booking at our Ajax clinic

Rossland Diagnostic Clinic offers mammography at Unit 102, 300 Rossland Road East in Ajax, with free parking and ground-floor access. If you are not sure whether to book now or after weaning, start with a conversation with your health-care provider. When you are ready, call us at 905-426-3111 or request an appointment, and mention that you are breastfeeding so we can help you plan a time that works around your baby.