SIGNALS AND MOLECULAR PATHWAYS INVOLVED IN IMPLANTATION, A SYMBIOTIC INTERACTION BETWEEN BLASTOCYST AND ENDOMETRIUM INVOLVING ADHESION AND TISSUE INVASION

Implantation is a complex process requiring the interaction of the bla stocyst, and subsequently the developing embryo with the endometrium. Initially, the detailed cellular interactions implicated in this proce ss were defined. More recently, many signals and molecular pathways ar e recognized that induce, or regulate the complex series of interactio ns required for implantation. In this review, the cellular and molecul ar interactions that take place during implantation are discussed.