Umbilical cord
Supernumerary vessels

Topic Completed: 1 November 2011

Revised: 20 February 2019

Copyright: 2002-2019,, Inc.

PubMed Search: Supernumerary vessels umbilical

Mandolin S. Ziadie, M.D.
Page views in 2019: 244
Page views in 2020 to date: 44
Cite this page: Ziadie MS. Supernumerary vessels. website. Accessed February 27th, 2020.
Definition / general
  • Four or more umbilical cord vessels due to an extra artery or vein
  • May be associated with fetal anomalies and maternal smoking
  • Thought to originate from persistent umbilical veins or vitelline vessels
Gross description
  • Looping may cause artifactual supernumerary vessels and should be excluded on gross examination
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