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[Morphological changes of the placenta under the influence of short wave penetration. Animal experiments].


 The effects of short-wave penetration on the placenta in various stages of pregnancy were studied in 30 pregnant rats. Short-wave exposure was found to increase the incidence of spontaneous abortion, and to foster histological abnormalities, including increase of the giant cell layer, hydropic zones, ischemic areas, and endothelial injuries. The role of the placenta in the development of fetal abnormalities is discussed. The authors recommend that short-wave treat ments not be undertaken during pregnancy.
