The Royan International Festival was established in 2000 by the late Dr. Saeed Kazemi Ashtiani, the former president of the Royan Institute, with the primary goal of encouraging researchers. Dr. Kazemi, a visionary leader, believed in fostering collaboration among scientists and, through the founding of this festival, sought to inspire them to intensify their efforts in scientific research. Over the first two decades of the festival, both the scientific quality and the number of submitted papers steadily increased, enhancing the prestige and impact of this international event. Research proposals are rigorously evaluated by a distinguished panel of both national and international judges. Over the years, exceptional research, which has made significant contributions to solving challenges in reproductive sciences and stem cell research, has been selected and honored through this process.