Figure 1: Normal placenta depicted using superb microvascular
imaging
Villous blood vessels (villous trees) are depicted from the fetal
surface (bottom) to the terminal villi (top). Large arrow, stem villi;
small arrow, terminal villi. Slow blood flow in the intervillous space
from the spiral artery is also visualized like as ”scatter,” which
matches the heart rate of the mother as the background of villous tree
(triangle).