Larry I. Lipshultz, M.D., is Professor of Urology and Chief of the Scott Department of Urology’s Division of Male Reproductive Medicine and Surgery at Baylor College of Medicine in Houston, Texas. Dr. Lipshultz, who holds the Lester and Sue Smith Chair in Reproductive Medicine, is a well-known authority on abnormalities of male reproduction, erectile dysfunction, and male hormone therapy. He has published more than 440 journal articles, edited over 10 books, and has instituted a fellowship training program in male reproductive medicine and surgery that has trained more than 120 physicians, who are now in practice both here and abroad.