John Edmond Buster (born July 18, 1941) is an American physician who, while working at the University of California at Los Angeles School of Medicine, directed the research team that performed the first embryo transfer from one woman to another resulting in a live birth. It was performed at the Harbor-UCLA Medical Center, reported in July 1983, and culminated in the announcement of the birth on February 3, 1984. In the procedure, an embryo that was just beginning to develop was transferred from the woman in whom it had been conceived by artificial insemination to another woman who gave birth to the infant 38 weeks later. The sperm used in the artificial insemination came from the husband of the woman who bore the baby.