Placenta
Umbilical cord
Velamentous insertion

Author: Mandolin Ziadie, M.D. (see Authors page)

Revised: 19 October 2017, last major update November 2011

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Velamentous insertion[title] umbilical cord

Cite this page: Ziadie, M. Velamentous insertion. PathologyOutlines.com website. http://pathologyoutlines.com/topic/placentavelamentous.html. Accessed November 22nd, 2017.
Definition / general
  • Insertion of umbilical cord into extraplacental membranes, with intramembranous portions of vessels exposed to possible trauma / rupture
  • Occurs in 1% of placentas
  • Associated with twin gestations, congenital malformations, maternal smoking and single umbilical arteries
  • Poses a risk for vascular compression, trauma and thrombosis with associated risks of fetal morbidity and mortality
Gross images

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Velamentous insertion of umbilical cord