Expansion
Ductus arteriosus becomes ligamentum arteriosum, ductus venosus becomes ligamentum venosum, umbilical vein becomes ligamentum teres
Expansion
| Fetal structure | Adult remnant |
|---|---|
| Ductus arteriosus | Ligamentum arteriosum |
| Ductus venosus | Ligamentum venosum |
| Umbilical vein | Ligamentum teres (round ligament of the liver) |
| Umbilical arteries | Medial umbilical ligaments |
| Foramen ovale | Fossa ovalis |
| Urachus | Median umbilical ligament |
A useful check: the paired structures (umbilical arteries) give the paired medial umbilical ligaments, whereas the single urachus gives the single median umbilical ligament. Confusing medial with median is one of the commonest slips in this list.