First published in 1963, this comprehensive text on embryology has long been respected for its scientific authority, pedagogy, and clinical relevance to medical education. Known for its outstanding illustrations and clear and concise writing, the text covers almost all aspects of embryology that would be of interest to medical students and their instructors. The Ninth Edition follows the organization of previous editions, first structured by chronology and then by system. New to this edition are 30 additional illustrations and clinical images, as well as a chapter on prenatal diagnosis and birth defects. Also included is Simbryo, an electronic supplement consisting of Flash animation showing the evolution of early embryonic development and different organ systems, as well as birth defects.