The Implantation Reaction

  • Colin A. Finn


Implantation involves the attachment of the blastocyst to the wall of the uterus with, in some cases, the embedding of the entire ovum in the uterine wall. Associated with it are very profound and characteristic changes in the endometrium both during preparation for implantation and following attachment of the blastocyst. In this chapter, the uterine changes that take place during preparation will be considered first and then the changes during the process of implantation. The former occur regularly and frequently throughout the life of most female mammals, whereas the latter are rarer events, especially in women. This division of the subject is also convenient for the consideration of the control mechanism involved. Whereas the preparative changes are largely directed by the varying levels of the hormones secreted by the ovary, once the implantation process has been initiated hormones play a largely permissive role.


Corpus Luteum Ovarian Hormone Luminal Epithelium Decidual Cell Uterine Epithelium 
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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • Colin A. Finn
    • 1
  1. 1.Department of Physiology, Royal Veterinary CollegeUniversity of LondonLondonEngland

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