Ultrasound Parameters of Umbilical Artery Blood Flow Are Associated with Amniotic Fluid and Umbilical Artery Concentrations of Erythropoietin and Oxidative Stress Injury

Table 1

The S/D, RI, and PI of UmA and MCA blood flows in normal and hypoxic fetuses at 28-31 gestational weeks.

Group		UmA			MCA
		S/D	RI	PI	S/D	RI	PI
Normal	80
Hypoxic	46
		8.81	6.44	8.44	12.37	14.86	15.94
		<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

Note: UmA: umbilical artery; MCA: middle cerebral artery; S/D: systolic to diastolic ratio; RI: resistant index; PI: pulse index.