Placenta
Gross / macroscopic variations and conditions
Umbilical cord
Velamentous insertion
Author: Mandolin S. Ziadie, M.D.
Last author update: 1 November 2011
Last staff update: 28 October 2020
Copyright: 2002-2023, PathologyOutlines.com, Inc.
PubMed Search: Velamentous insertion[title] umbilical cord
Cite this page: Ziadie MS. Velamentous insertion. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/placentavelamentous.html. Accessed June 1st, 2023.
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
Images hosted on other servers:
Velamentous insertion of umbilical cord
