Check out this cross-section of an umbilical cord . There are normally two arteries and one vein in the human umbilical cord. The umbilical cord contains Wharton's jelly, a gelatinous substance made
![Medicina | Free Full-Text | Considering the Effects and Maternofoetal Implications of Vascular Disorders and the Umbilical Cord Medicina | Free Full-Text | Considering the Effects and Maternofoetal Implications of Vascular Disorders and the Umbilical Cord](https://pub.mdpi-res.com/medicina/medicina-58-01754/article_deploy/html/images/medicina-58-01754-g001.png?1669881702)
Medicina | Free Full-Text | Considering the Effects and Maternofoetal Implications of Vascular Disorders and the Umbilical Cord
![Prenatal diagnosis of four‐vessel umbilical cord with supernumerary vein varix: A case report and literature review - Lei - 2017 - Journal of Obstetrics and Gynaecology Research - Wiley Online Library Prenatal diagnosis of four‐vessel umbilical cord with supernumerary vein varix: A case report and literature review - Lei - 2017 - Journal of Obstetrics and Gynaecology Research - Wiley Online Library](https://obgyn.onlinelibrary.wiley.com/cms/asset/5750b7a2-7778-4d86-8905-eaea6c3b9b99/jog13324-fig-0002-m.jpg)