Concern over the direct effects of ionizing radiation on development of the fetus in utero and the indirect effects on the genetic potential of the maternal ovary has influenced most obstetricians to curtail the use of diagnostic roentgenography during pregnancy. The overall effects of this concern probably have been good but individual patients undoubtedly have suffered because xray examinations essential to the development of effective treatment regimens have been withheld. Bishop's book, Radiologic Studies of the Gravid Uterus, places this entire problem in proper prospective.
Until relatively recently the scope of diagnostic radiology during pregnancy was limited. Most studies were performed to diagnose pregnancy, to determine the number of fetuses, to study their bony structures, and to evaluate pelvic capacity. Bishop describes these studies in detail and adds a number of more sophisticated procedures designed to determine fetal age and size, to detect external and internal fetal soft tissue anomaly,