Sang-Hwan Hyun is a Professor at the College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea. He completed his Ph.D. studies in Veterinary Clinics at Seoul National University (2003). He has published 173 papers with 2774 citations and an h-index of 27 (Scopus, 7 November 2023). His research topics mainly include: embryos, oocytes, IVM, embryo transfer, embryo culture, assisted reproductive technology, and reproductive biology.