Placenta
Gross / macroscopic variations and conditions
Fetal membranes
Circummarginate placenta
Author: Mandolin S. Ziadie, M.D.
Last author update: 1 September 2011
Last staff update: 28 October 2020
Copyright: 2002-2023, PathologyOutlines.com, Inc.
PubMed Search: Circummarginate placenta
Cite this page: Ziadie MS. Circummarginate placenta. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/placentacircummarginate.html. Accessed June 7th, 2023.
Definition / general
- Insertion of the membranes away from the placenta without a distinct ridge at the point of insertion
- More common in multigravid pregnancies
Gross description
- Like circumvallate placentas, the point of membrane insertion is inside the edge of the disc
- However, no firm ridge at the site of insertion is present
- Margin is thin and flat
