ABSTRACT
Echoes from the branching villi, which are bathed in maternal blood in the intervillous space (Fig. 5), produce
FIGURE 3 A-C ■ Bilobate placenta. (A) Sagittal scan at 17 weeks shows anterior (P1) and posterior (P2) placental lobes that are similar in size. (B) Transverse scan at 35 weeks. Note interplacental cord insertion (arrow). (C) Maternal surface of the placenta after delivery. The umbilical cord is typically inserted between the two lobes (arrow). F, fetus.
