Placental Shape Aberrations

  • Kurt Benirschke
  • Peter Kaufmann


The factors that determine the site of nidation of the blastocyst are not fully understood. The human blastocyst implants normally in the upper portion of the uterus, nevertheless, abnormal implantation is frequent and may lead to pregnancy complications, such as placenta previa. It has been suggested, for instance, that the site of placental implantation influences the frequency of fetal mal-presentation. Wingate and Pauls (1968) studied this with 51 Chromium placental localization in 85 patients. They found no correlation between fun-dal or lower uterine implantation and fetal mal-presentations. Previous authors had suggested that abnormal location of the blastocyst in the endometrium may also lead to abnormal forms of the mature placenta. An early proponent of such thoughts was Schatz (1886), who envisaged normal, broad, and superficial implantation.


Uterine Rupture Placenta Previa Decidual Cell Placenta Accreta Tubal Pregnancy 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Kurt Benirschke
    • 1
    • 2
  • Peter Kaufmann
    • 3
  1. 1.Pathology and Reproductive MedicineUniversity of CaliforniaSan DiegoUSA
  2. 2.University Medical CenterSan DiegoUSA
  3. 3.Institut für Anatomie der Medizinischen Fakultät, Rheinisch-Westfälische TechnischeHochschule AachenAachenGermany

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