Thomas B. (Rusty) Pool, Ph.D., HCLD(ABB) is the Scientific Director of the Fertility Center of San Antonio, San Antonio, Texas, USA, a position he has held for 33 years. Prior to this, he was an Associate Professor of Cellular and Structural Biology at the University of Texas Medical School in San Antonio where he worked on culture and cryobiology of non-human primate embryos. He is a board member of the Pacific Coast Fertility Society and serves on the editorial boards of Fertility and Sterility and the Journal of Assisted Reproduction and Genetics. His research interests have centered upon the physiology of the preimplantation human embryo and improvements to embryo culture technology.