This is the second volume in a series reviewing important issues and developments in obstetric ultrasound. The interdisciplinary approach draws together radiologists, obstetricians, and scientists to provide full coverage of clinical problems such as ectopic pregnancy and prenatal diagnosis of neural tube defects. It offers wide ranging reviews and in-depth chapters on specific topics. This annual publication provides the most up-to-date volume on obstetric ultrasound providing a review of contemporary principles and practice around the world.