Figure 3. Typical experiment from survivor group, demonstrating pulsatile glutamate efflux in fraction 8 with return to basal efflux in subsequent fractions. In this animal, eight hemorrhage periods (fractions 5–12) were required to achieve fetal arterial pH < 7.00. There was a progressive decline in uterine blood flow (UBF) during the hemorrhage, with a return toward normal after retransfusion of maternal blood.