pregnancy MRI what to expect
Informed by recognized medical guidance
Overview
An MRI (magnetic resonance imaging) scan is a safe imaging test that uses a strong magnet and radio waves to create detailed pictures of the inside of your body. During pregnancy, it is sometimes used to check on the health of you or your baby when ultrasound pictures are not clear enough.
Key facts
- MRI uses no ionising radiation, so it is generally considered safe in pregnancy.
- It is usually only recommended when other tests, such as ultrasound, have not given enough information.
- The scan is painless, but you may need to lie still for 30-60 minutes in a narrow machine.
MRI is not a routine test in pregnancy, but it is used fairly often when doctors need more detail about a possible problem.
It can be used for pregnant people at any stage, though it is most common in the second and third trimesters. It may be used to look at the baby's brain, spine, or other organs, or to examine the placenta and surrounding structures.
Symptoms
- Heavy vaginal bleeding
- Severe abdominal or pelvic pain
- Signs of pre-eclampsia, such as a sudden severe headache, vision changes, or swelling in your face or hands
- ⚠Any new or worsening pain that is not severe but is worrying you
- ⚠A sudden decrease in your baby's movements
- ⚠Fever or chills during pregnancy
Common symptoms
- Ultrasound images that show something uncertain and need a closer look
- Ongoing pelvic or abdominal pain that your doctor wants to investigate further
- Suspected issues with the placenta, such as placenta accreta
Symptoms in children
- If you are pregnant and your baby may need an MRI, this is usually to examine the baby’s brain, face, chest, or abdomen more clearly.
Symptoms in older adults
- The reasons for an MRI during pregnancy are the same for all ages. There is no age limit for this scan.
Causes
Main causes
- An MRI is a test, not a condition. You may be offered it when your healthcare team needs more detail than ultrasound can provide.
- Common reasons include a suspected abnormality in the baby’s brain, spine, or organs.
- It can also be used to look at the placenta or blood vessels in the pelvis.
Risk factors
- Having a medical condition that makes MRI less safe, such as a metal implant, pacemaker, or certain types of clips in your body
- Feeling claustrophobic (fear of enclosed spaces), which can make the scan harder to tolerate
- Advanced pregnancy, because lying flat can be uncomfortable and may affect blood flow
When to see a doctor
See a doctor urgently if:
- If you have any of the emergency symptoms listed above, call your local emergency number right away.
Book a routine appointment if:
- If your doctor or midwife recommends an MRI, ask them to explain why it is being offered and what they hope to find.
Diagnosis
MRI is a diagnostic imaging method. It does not diagnose everything, but it provides detailed images that help your healthcare team make a diagnosis or rule one out.
Tests that may be done
- MRI scan of the abdomen or pelvis
- MRI scan of the baby's head, spine, or body
- Doppler ultrasound to look at blood flow, sometimes done as well
What to expect at your appointment
You will lie on a padded table that slides into the MRI machine. The machine will make loud knocking noises. You may be given ear protection. You will be asked to hold still and sometimes hold your breath for a few seconds. The scan usually takes between 30 and 60 minutes. If it is done for a baby, you may be asked to have a slightly full bladder. The scan is painless, but you might feel cramped or warm. Let the technician know if you feel uncomfortable.
Treatment
An MRI itself is not a treatment. It provides information. Any treatment will depend on what the scan shows. Your healthcare team will discuss the results with you and explain the next steps.
Self-care at home
- Before the scan, tell your healthcare team about any medical devices or metal in your body.
- Wear comfortable clothing without metal zips or buttons, or you may be asked to change into a hospital gown.
- If you feel anxious, ask about ways to relax, such as slow breathing or listening to music (if allowed).
Medical treatments
If the MRI finds a problem, treatment options will be individualised. These might include closer monitoring, medications, procedures, or, in rare cases, surgery. Your specialist will explain the risks and benefits of each option in your situation.
When is surgery considered?
Surgery during pregnancy is rare and only considered when strictly necessary. If a condition requires surgery, it may be planned for after delivery unless the situation is urgent.
Living with this condition
After the MRI, you can go back to your normal activities unless your doctor tells you otherwise. There is usually no recovery time.
Lifestyle tips
- Ask your healthcare team when you will receive your results and how they will be communicated.
- Take a trusted person with you for support if you feel that would help.
- Do not hesitate to ask questions about anything you do not understand.
Diet and exercise
There is no special diet or exercise needed before or after a pregnancy MRI. Follow your usual healthy eating pattern unless your doctor gives other advice.
Mental health and emotional wellbeing
Waiting for scan results can be stressful. It is normal to feel worried or anxious. Talk to your partner, family, or a counsellor. Remember that most scans do not show a serious problem, and your healthcare team is there to support you.
Prevention
MRI is a diagnostic test rather than a disease, so prevention is not the right way to think about it. However, many conditions that lead to an MRI cannot be prevented. The scan helps your team manage your care early.
Vaccines
Vaccination during pregnancy follows national guidelines. The MRI does not affect vaccination. Ask your healthcare team if you have questions about vaccines.
Screening programmes
MRI is sometimes used as a follow-up screening tool when an initial test, like ultrasound, suggests a potential issue. It is not used for routine screening in all pregnancies.
Complications
If left untreated
- If a condition is missed, a mother or baby might not receive timely care.
- Some conditions, like placenta problems or fetal anomalies, can worsen or become harder to manage if not detected early.
Long-term outlook
MRI is a safe and valuable tool. For most pregnant people, the scan results are reassuring. When a problem is found, early detection gives you and your healthcare team the best chance to plan care and improve outcomes. Many issues detected by MRI can be managed successfully with a specialist team.
Find support
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.