Sonographic markers for early diagnosis of fetal malformations

Figure 3 Fetal normal heart. Schematic representation of the blood circulation in fetus: the blood that comes into the right side of the fetal heart (blue part) is pumped into the pulmonary trunk (PA) and flows through the ductus arteriosus (circled in yellow) directly out into the aorta (AO). The ductus arteriosus is an extra blood vessel of the fetal heart that creates a bypass for the blood oxygenated not by the lungs, but through the placenta[114].