The American College of Obstetricians and Gynecologists (ACOG), 2020 guidelines are evidence-based recommendations for the use of imaging diagnostic tests during pregnancy. Imaging studies are essential for the evaluation of acute and chronic conditions. However, it is important to consider the safety of these diagnostic tools for use in pregnant and lactating women and their infants. Highlights Ultrasonography and magnetic resonance imaging (MRI) are not associated with risk. They should be used only when clinically needed.

They are the safest imaging techniques of choice during pregnancy. With a few exceptions, computed tomography (CT) scan and nuclear medicine imaging techniques are used at a lower dose, and are therefore not associated with fetal harm. Hence, if necessary, they should not be withheld from a pregnant patient. The use of gadolinium contrast with MRI as a diagnostic…