The maternal pelvic artery was detected with the B-mode, and volume of flow through it measured with the pulsed ultrasound Doppler device in the supine and left recumbent positions. The blood flow state and vascular resistance of the maternal pelvic artery and of the umbilical cord artery were investigated in gestosis and normal pregnancy. The volume of blood flow through the right maternal pelvic artery showed a tendency to increase after the posture was changed to the left recumbent position. The peak frequency (Fp) showed a tendency to increase in gestosis, particularly in the edema group. The spectral width (SWp)/Fp value showed a tendency to be lower in the edema group than in normal subjects, and showed a higher value in hypertension accompanied by proteinuria than in normal subjects. As an indication of peripheral vascular resistance, the pulsatility index (PI) in the maternal pelvic artery was determined, and resistance index (RI) in the umbilical cord artery was also determined. The PI showed a tendency to increase more in gestosis than in normal subjects, particularly in hypertension accompanied by proteinuria. The RI was higher in maternal hypertension accompanied by proteinuria than in normal pregnancy. The hematocrit and fibrinogen vales were slightly higher, though insignificantly, in gestosis than in normal subjects.