Before we are born : essentials of embryology and birth defects / Keith L. Moore, BA, MSc, PhD, DSc (OSU), DSc (WU), FIAC, FRSM, FAAA, Professor Emeritus, Division of Anatomy, Departmrnt of Surgery, Former Professor and Chair, Department of Anatomy, and Associate Dean for Basic Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada, Former Professor and Head of Anatomy, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; T. V. N. (Vid) Persaud, MD, PhD, DSc, FRCPath (Lond.), FAAA, Professor Emeritus and Former Head, Department of Human Anatomy and Cell Science, Professor of Pediatrics and Child Health, Associate Professor of Obstetrics, Gynecology, and Reproductive Sciences, Max Rady College of Medicine, Faculty of Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada, Part-Time Professor of Anatomy, St. George's University, Grenada, West Indies and Mark G. Torchia, MSc, PhD, Associate Professor, Department of Surgery, Associate Professor, Department of Human Anatomy and cell Sciences, Max Rady College of Medicine, Rady Faculty of Health Sciences, Executive Director, Centre for the Advancement of Teaching and Learning, Vice-Provost (Teaching and Learning), University of Manitoba, Winnipeg, Manitoba, Canada.