No doubt it is one of the most controversial topics. However we will try to demystify the topic in light of current scientific evidence.

Firstly, it is important to stress that Magnetic Resonance Imaging (MRI) has been used for more than 30 years to evaluate fetal abnormalities, placental conditions and pathologies in pregnant women. And every day new technologies ("sequences") are developed that allow faster and higher quality images to be acquired for diagnostic purposes.

Many experimental laboratories have shown no evidence of injury or "warming" of the fetus ("baby"). A few studies have shown adverse effects in animals, but these data can not be extrapolated reliably to humans.

A recent (2015) follow-up study of newborns whose mothers performed MRI in the first trimester of pregnancy did not detect abnormalities ("damage") in infants related to MRI previously performed.

Other recent work (2010, 2015) also did not characterize hearing loss in newborns ("babies").

Undoubtedly more work is needed to definitively remove this cloud of doubts, fears and questions that hang over the "head" of "future moms", and the decision to indicate the method should be an open dialogue between obstetricians and contraindicating benefits versus potential risks, especially when ultrasonography could not be elucidated and there is the possibility of intervention or anticipation of labor based on this result; or even when there is a clinical condition with a probable risk to maternal health needing magnetic resonance imaging.

Note:
The information posted on this site should not be considered medical advice. Do not forget that Medicine is a science in constant transformation and countless works and evidences are modified every day.
If you are a non-medical reader, consult your physician about any medical issues related to diseases, conditions, symptoms, diagnosis, treatment and side effects.