umbilical vein

synonym: left umbilical vein
https://doi.org/10.1351/goldbook.11341

Vessel within the umbilical cord, entering the fetus at the umbilicus and carrying oxygenated blood from the placenta.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 817 [Terms] [Paper]