Professor Seidel (1943-2021) was a distinguished professor and expert in reproductive medicine and made significant contributions to the international scientific, academic, medical, veterinary, embryo transfer, and biotechnology communities. He received his BS in Dairy Science from Penn State in 1965 and both his MS (1968) and Ph.D. (1970) from Cornell University in Reproductive Physiology. In 1971, he joined the faculty of Colorado State University and founded their Embryo Transfer Lab in 1973. His dedication to animal agriculture was more than academic, from showing Ayrshire cattle during his youth to owning and managing an Angus cow-calf ranch operation at the time of his death. He was an appreciator of good science and an inspiring, nurturing mentor, pushing his students to realize what was possible. He was a member of numerous associations, including the National Academy of Sciences and the National Academy of Inventors. He was the founder and first President of International Society of Embryo Transfer (IETS).