This volume contains the proceedings of the International Symposium on Embryo Implantation: Molecular, Cellular and Clinical Aspects, held from October 3-6, 1997 in Newport Beach, California. Internationally recognized experts discuss the development and future of human in vitro fertilization and embryo implantation, the cellular aspects of implantation, hormonal regulation, molecular markers of receptivity, trophoblast factors, primate models and animal studies, and transcriptional regulation of maternal-fetal recognition.