Human Embryology

The aim of this book was to develop those aspects of embryology that form an important background for the other medical sciences, especially obstetrics and gynecology. In this edition the author rewrote the chapter on cleavage, germ layers, and establishment of the embryonic body, basing his new data on the early human embryos described by Hertig and Rock, rather than on inference from conditions in other mammals. Likewise, the data about the early stages of human implantation presented by the same investigators led to extensive changes in the chapter on the fetal membranes and the placenta. Because of the progress in the surgical treatment of congenital cardiovascular defects, a number of additional illustrations of congenital defects was added. This book contains practically all the useful knowledge we possess about human embryology. The material is presented in an interesting, easily readable style. The illustrations are numerous, clear, and highly instructive. Many