Abstract
In recent years, studies of gallbladder disease have focused on the lipid composition of bile.1 The actual function of the gallbladder in terms of contractility, residual volume, and rate of emptying has been difficult to study because of the repeated x-ray exposure that would be required. In this issue of the Journal, Braverman and his co-workers describe the changes found on ultrasonography in gallbladder function in pregnancy.The study of gallbladder function in pregnancy is important because of the well-documented increased prevalence of gallstones in women, especially in association with pregnancy. This increased prevalence begins at pubescence and diminishes . . .

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