Table 3.

Fetal characteristics during basal and AA metabolic study periods

	Basal	AA	P Value
Fetal artery
BCAA, µM	636 ± 60	1,158 ± 61	<0.001
pH	7.35 ± 0.01	7.33 ± 0.01	<0.005
Hematocrit, %	33.9 ± 0.8	32.4 ± 0.9	<0.05
Hemoglobin, mM	6.8 ± 0.2	6.5 ± 0.2	<0.05
%SO2	40.9 ± 4.3	28.4 ± 3.5	<0.001
Po2	20.7 ± 1.3	17.9 ± 0.8	<0.01
O2 content, mM	2.8 ± 0.3	1.9 ± 0.3	<0.001
Glucose, mM	1.08 ± 0.06	0.99 ± 0.07	<0.005
Lactate, mM	2.8 ± 0.2	3.6 ± 0.5	0.07
Umbilical blood flow, ml·min−1·kg−1	197 ± 23	176 ± 15	0.13
Umbilical plasma flow, ml·min−1·kg−1	130 ± 17	119 ± 11	0.19

Data are means ± SE; n = 4 fetuses (1 singleton and 3 twin fetuses) each studied during basal and AA periods.