Hormonal regulation of implantation

Implantation requires synchronization between the developing embryo and endometrium. The dialog between embryo and endometrium and the receptivity of the latter is under the control of the sex steroids. estrogen and progesterone.. as well as other hormones, such as prolactin, calcitonin, and human chorionic gonadotropin (hCG). Although the complex process of implantation remains to be characterized fully, numerous cellular and molecular markets of endometrial receptivity-many of which are regulated hormonally-have been defined. ThiS article addresses the endocrine-mediated aspects of implantation as they pertain to normal reproduction and assisted reproductive technolongy (ART).