The ductus venosus closes after birth and becomes the

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After birth the ductus venosus closes, leaving behind a fibrous cord in the liver called the ligamentum venosum. This remnant marks where the fetal shunt carried blood from the umbilical vein to the inferior vena cava, bypassing hepatic sinusoids. The ligamentum venosum sits along the fissure for the ligamentum venosum on the liver’s inferior surface. The other postnatal remnants are different: the fossa ovalis is the remnant of the foramen ovale in the atrial septum, the ligamentum arteriosum is the remnant of the ductus arteriosus between the pulmonary artery and the aorta, and the umbilical ligament (ligamentum teres hepatis) is the remnant of the umbilical vein.