The umbilical vein after birth becomes the ligamentum

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After birth, the umbilical vein collapses and leaves behind a fibrous cord called the ligamentum teres hepatis (round ligament of the liver). This remnant runs in the free edge of the falciform ligament from the umbilicus to the porta hepatis and marks where the umbilical vein carried oxygenated blood to the liver during fetal life. The other fetal shunts leave different remnants: the ductus venosus becomes the ligamentum venosum, the ductus arteriosus becomes the ligamentum arteriosum, and the foramen ovale becomes the fossa ovalis.