John Mercer Thorp, Jr. (born 1957 or 1958)[1] is an American obstetrician-gynecologist a Faculty Fellow at the Carolina Population Center, and the Hugh McAllister Distinguished Professor in the Department of Obstetrics and Gynecology at the University of North Carolina at Chapel Hill (UNC), where he directs the Division of General Obstetrics and Gynecology and serves as Vice Chair of Research.