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Placental gross/microscopic abnormalities, non-neoplastic


Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 10 October 2011, last major update October 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.


● Bleeding between the placental floor and the uterine wall or between the placental parenchyma and membranes
● May be associated with vaginal bleeding, oligohydramnios and premature delivery


● Marginal hemorrhages are related to maternal age, parity and smoking
● Associated with marginal cord insertion, velamentous vessels and implantation in the lower uterine segment

Gross description

● Chronic hemorrhage can result in marginal hematoma formation with circumvallate membranes

Micro description

● Chorioamnionic hemosiderosis may be present

End of Placenta > Placental gross/microscopic abnormalities, non-neoplastic > Hemorrhage

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