Relaxin: PDF OnlyRelaxin A persistent challengeISRAEL, LEON S. M.D.; GROEBER, WALTER R. Jr. M.D. Author Information From the Department of Obstetrics and Gynecology, Graduate School of Medicine, University of Pennsylvania, and the Pennsylvania Hospital, Philadelphia, Pa. Obstetrics & Gynecology 15(1):p 2-8, January 1960. Buy © 1960 The American College of Obstetricians and Gynecologists