Thoroughly revised and updated with the latest advances in human embryology, including the cellular and molecular basis of development, Before We Are Born: Essentials of Embryology and Birth Defects, 11th Edition, offers clinically relevant and highly illustrated coverage of this complex field. It is based on the popular text The Developing Human, written by the same expert and experienced educator author team. Coverage has been carefully selected to provide an easily accessible understanding of all the core aspects of embryology, including normal and abnormal embryogenesis, causes of birth defects, and the role of genes in human development. Prev. ed.: 2019.