Embryo-Endometrial Relationships during Implantation

  • Viviane Casimiri
  • Alexandre Psychoyos


The process of ovum implantation in mammalian uterine endometrium differs among species. Although the morphological as well as the physiological details vary, certain conditions are common to all types of ovum implantation: the embryo must be at the blastocyst stage, and the endometrium, after precise preparation by ovarian hormones, must have reached a stage of optimal receptivity. Therefore, successful implantation requires precise timing between the development and interactions of the ova and the endometrium. Failure of synchronization of the different events delays or prevents egg implantation.


Zona Pellucida Trophoblastic Cell Luminal Epithelium Histidine Decarboxylase Uterine Receptivity 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • Viviane Casimiri
    • 1
  • Alexandre Psychoyos
    • 1
  1. 1.Laboratoire Physiologie de la Reproduction, E.R. 203, C.N.R.S.Hôpital de Bicêtre (INSERM)BicêtreFrance

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