In this Master Class in Gynecologic Surgery, I have asked Dr. Dee E. Fenner, Harold A. Furlong Professor of Women's Health and director of gynecology at the University of Michigan, Ann Arbor, to discuss the technique of posterior colporrhaphy and perineorrhaphy. Dr. Fenner's current research includes mechanisms of vaginal wall support failure; she is a nationally known expert in urogynecology and travels throughout the country as an invited lecturer. It is an honor to have Dr. Fenner's recommendations on this very pertinent topic.