Can Contrast be used during Pregnancy and Breast-feeding?

Studies have not shown any ill effects to the embryo or foetus but there are no controlled studies in pregnant women to confirm the safety for use in humans too. Since, wherever possible, exposure to radiation should be avoided during pregnancy, the benefits of any X - ray examination, whether with or without contrast material, should for this reason alone be carefully weighed against the possible risk. Contrast media are poorly excreted in human breast milk. From experience gained so far, harm to the breast feeding infant is unlikely to occur.