Urographic study of the upper urinary tract in pregnancy has been the subject of several recent contributions to the literature. Our present purpose is to review briefly the various salient features already stressed and add several of our own concepts, gained from a study of sixty consecutive unselected normal pregnancies. In limiting our study to intravenous or excretory urography, it was intended to investigate the physiology of the upper tract free of any mechanical intervention. Particular attention was placed on studies taken with the patient in the upright position, since it is our belief that renal mobility and nephroptosis is a vital factor in predisposing to complications.
Patients were taken as they presented themselves at the antepartum clinic of the Bayonne Dispensary. Each had been investigated from a medical and an obstetric standpoint and was apparently normal. Urinalysis in each instance was likewise free of pathologic conditions. The stage of