Placental Types

  • Kurt Benirschke
  • Graham J. Burton
  • Rebecca N. Baergen


All viviparous vertebrates develop a system of extraembryonic membranes that surround the fetus. The apposition or fusion of these fetal membranes with the uterine mucosa, for purposes of maternal-fetal physiological exchange, initiates the formation of the placenta. The fetus is connected to the membranes by the umbilical cord. The maternal-fetal contact zone, provided by the membranes and the endometrium, represents the placenta.


Imprint Gene Intervillous Space Chorionic Plate Fetal Capillary Chorioallantoic Placenta 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Kurt Benirschke
    • 1
  • Graham J. Burton
    • 2
  • Rebecca N. Baergen
    • 3
  1. 1.La JollaUSA
  2. 2.Physiological LaboratoryUniversity of Cambridge Centre for Trophoblast ResearchCambridgeUK
  3. 3.Department of Pathology and Laboratory Medicine New York-Presbyterian HospitalWeill Medical College of Cornell UniversityNew YorkUSA

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