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