OB TRIAD
Fetal Circulation Shunts
Ductus venosus (UA → IVC)
Foramen ovale (RA → LA)
Ductus arteriosus
(PA → DA)Ductus venosus carries blood from umbilical vein to the inferior vena
cava.
Foramen ovale carries blood from right to left atrium.
Ductus arteriosus shunts blood from pulmonary artery to descending
aorta.