The third edition of the book, Practical Guide to High-Risk Pregnancy and Delivery, has been completely revised. Several changes have been made in the book to keep up with multiple new developments. However, the purpose of the book remains unchanged: to provide residents in Obstetrics and Gynecology, fellows in Maternal-Fetal Medicine, obstetricians, general physicians, and interested nurses and medical students with a source of practical information about complications of pregnancy.