Great advances in ultrasound instrumentation have enabled the physician to delineate subtle intrauterine changes. Not only can specific measurements of the fetal body be obtained but tissue textures within fetal organs can be appreciated. The perinatologist is constantly searching for ways to learn more about the fetus, and ultrasound has clearly become a major implement in this search. The following discussion will focus on information made available by ultrasound for aid in the modern management of hypertension, one of the most challenging conditions complicating pregnancy.