The effects of MRIs on pregnancy are largely unknown. But overall, doctors recommend against contrast dye for pregnant women. Most doctors will not perform an MRI during the first trimester unless it is necessary. In the second or third trimesters, MRIs can be performed at 3.0 tesla (T) or less.
If you are pregnant and seeking an MRI, your pain management specialist can determine whether it is safe for you and find alternatives, if necessary.