Glycoconjugates as positive and negative modulators of embryo implantation.

A variety of studies indicate that complex glycoproteins participate in or modulate adhesive interactions occurring during embryo implantation. In particular, proteoglycans and proteins that bind proteoglycans are involved at multiple stages of this process. Identification of these binding proteins and the molecular controls over glycoconjugate expression are required to develop a comprehensive understanding of the implantation process.