Figure 2.

Images of the fetal (A) and maternal (B) aspects of the placental vascular network in a representative placenta collected from a pregnancy complicated by fetal growth restriction (FGR) and delivered at 37 weeks of gestation. Original magnification, ×1. A separate image of the fetal aspect is shown under 3× magnification (C). The umbilical arteries contain deoxygenated blood and are shown in blue; the umbilical veins contain oxygenated blood and are shown in red. Note that there appear to be many fewer veins in this FGR placenta compared with a normal placenta (Figure 1). 1, Grade 1 vein (umbilical vein); 2, Grade 2 vein; 3, Grade 3 vein; 4, vacuolated changes; 5, nodular changes.