Placental gross / microscopic abnormalities, nonneoplastic
Circummarginate placenta

Topic Completed: 1 September 2011

Minor changes: 15 February 2019

Copyright: 2002-2019,, Inc.

PubMed Search: Circummarginate placenta

Mandolin S. Ziadie, M.D.
Page views in 2019: 1,388
Page views in 2020 to date: 567
Cite this page: Ziadie MS. Circummarginate placenta. website. Accessed June 1st, 2020.
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
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