Revised, updated, and expanded to twice its original size, this handy atlas is a complete ready-reference guide to obstetric and gynecologic ultrasound and sonographic evaluation of the fetus. It depicts the ultrasound appearances of normal anatomic structures as well as the abnormalities most commonly encountered in clinical practice. The Second Edition features over 700 ultrasound scans--more than twice as many as the previous edition--and new chapters on scanning techniques; infertility; amniocentesis and chorionic villus sampling; and the maternal abdomen and pelvis in pregnancy.The book contains invaluable information on making accurate fetal measurements and calculations. Both the chapter on measurements and calculations and a special appendix present the most routinely used fetal measurements, along with abbreviated tables, graphs, and computer programs designed for programmable pocket computers--all of which can be used to derive clinically useful parameters such as fetal weight estimations.