Following Mann and Higgins' pioneer study of the effect of pregnancy upon the emptying of the gall bladder in gophers, several attempts have been made to appraise the efficiency of this organ in gravid women, but with contradictory results. The latter may be attributed to difficulties inherent in visualizing the gall bladder of pregnancy, to lack of quantitative methods of measuring the flow of bile and to absence of post-partum examination of individuals selected for study. The present analysis is based upon intravenous cholecystography and upon computation of the changing volumes of the gall bladder after a standard meal. During the last 2 years 21 gravid women have been subjected to this test. Curiously enough, in view of some of the reports in the literature, the gall bladder of only one of these failed to visualize. Three other series were discarded because of gall stones, vomiting or unsatisfactory shadows. Of the remaining 17 patients, 4 had been gravid 2 to 3 months, and thirteen 5 to 8 months. Five of the latter were also visualized post-partum. Inspection of the mean curves of evacuation of the gall bladder in these groups shows that in the 13 women 5 to 8 months gravid (most of them primigravidae) only half the contents of the gall bladder had been discharged 40 minutes post-cibum, whereas in 12 nulligravidae of comparable age nearly three-fourths of the contents had been emptied (Fig. 1). This retardation is even more striking when the gravid and post-partum curves of 5 of these individuals are compared, During pregnancy these 5 gall bladders discharged only 8% of their volume in the first 20 minutes post-cibum, whereas 6 to 9 weeks post-partum the same organs discharged 48%.
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