Placental gross / microscopic abnormalities, nonneoplastic
Circumvallate placenta

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

Revised: 12 October 2017, last major update September 2011

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

PubMed Search: Circumvallate placenta

Cite this page: Ziadie, M. Circumvallate placenta. website. Accessed November 15th, 2018.
Definition / general
  • Insertion of the membranes away from the peripheral edge due to a folding / rolling of the chorion on itself
  • Portion of extrachorial disc is present at the edge
  • Associated with low birth weight and multigravid pregnancies
  • Usually attributed to marginal hemorrhage
Gross description
  • Membranes insert away from the peripheral margin
  • Firm ridge at the site of insertion is usually present
  • If cysts and other gross aberrations present, may be associated with fetal and maternal abnormalities
Gross images

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Double back membranes