Imaging Alternatives to X-Rays During Pregnancy

How do the options compare?

Options are stacked on five dimensions relevant to pregnancy use: mainstream OB guidance, pregnancy-specific evidence, dosing predictability, onset, and side-effect and interaction profile.

• MotherToBaby says typical medical X-rays are not expected to expose a fetus to levels associated with complications, while higher exposures are uncommon in routine care and the imaging team can consider shielding and the body area studied. 1
• A review of imaging in pregnancy describes ultrasound as using sound waves and MRI as using magnetic fields rather than ionizing radiation, and reports no proven fetal harm from MRI in the available evidence. 2
• A review of X-ray and molecular imaging in pregnancy says medically appropriate imaging procedures generally expose the fetus to low radiation levels, while concern is greater for high therapeutic exposures. 3
• A review of radiological decision-making in pregnancy explains that ultrasound uses sound and MRI uses magnetic fields, and it frames imaging decisions around the expected clinical benefit and the risks of missing or delaying an evaluation. 4
• The imaging review distinguishes MRI without contrast from gadolinium-enhanced MRI. Gadolinium crosses the placenta and has uncertain fetal effects, so the contrast decision requires a separate clinical risk-benefit assessment. 5

Which option makes sense?

Options in this comparison can differ substantially in suitability. Please consult your healthcare provider to interpret the evidence, limitations, and cautions before choosing an option or changing your plan.

Disclosure: Pregnancy Smart is a supplement maker. The options compared above sit outside our own product line; this page describes their pregnancy evidence on its own merits.