Koji Yoshinaga, Ph.D., joined the RSB in 1978. He is the Program Director for a portfolio of grants in reproductive endocrinology and immunology. In addition, he serves as the Research Coordinator for the Cooperative Program on Trophoblast-Maternal Tissue Interactions and for the Cooperative Agreement Conference grants of the Society for the Study of Reproduction and the Society for Gynecologic Investigation. He serves as Director of the Reproductive Sciences of the Americas Network (RSANET) project that enhances international collaboration in training and research in reproductive sciences among Pan American countries. He also serves as the Research Coordinator of the SCCPRR Research Focus Groups on the Endometrium Function/Dysfunction and on Endometriosis. He received his B.S., M.S., and Ph.D. from the University of Tokyo and received postdoctoral training in the Training Program in Reproductive Physiology at the Worcester Foundation for Experimental Biology, and at the ARC Unit of Reproductive Physiology and Biochemistry in Cambridge, England. Dr. Yoshinaga was Associate Professor of Anatomy at Harvard Medical School before joining the RSB. His research background is in implantation and reproductive endocrinology.