Doppler imaging was used to examine renal blood flow in 60 pregnant women with preeclampsia (PE) at 30-34 weeks' gestation. Group 1 consisted of 30 pregnant women with mild PE and Group 2 comprised 30 pregnant women with severe PE. A control group included 30 women with physiological pregnancy. Renal and hepatic blood flows were investigated by duplex pulsed-wave and color Doppler imaging using a 3.5-MHz sector transducer. The resistance of intrarenal segmental and interlobular arteries continued to rise with more severe PE, indicating the considerably increased resistance of intrarenal artery walls, decreased renal blood flow, and worsening renal function. The hepatic vessels displayed the same pattern of a change in the vascular resistivity index. Thus, evaluation of renal and hepatic blood flows can reveal systemic hemodynamic disorders in pregnant women with PE and these indicators correlate with its severity. A high resistance and a high diastolic/systolic ratio in the renal and hepatic arteries and veins should be considered as predictors of severe PE before its clinical manifestation and as indicators to reconsider the tactics of management and the choice of a delivery mode.