This Atlas represents almost 50 years of study of embryos, fetuses, and perinatally dead infants. It includes more than 200 ultrasound images essential to modern diagnosis and important in the correlation with pathologic examination and for genetic counseling. In the past, products of conception frequently have been discarded or given only a cursory pathologic examination; however, in recent years it has become important to carefully examine these specimens and study embryonic tissue to accurately determine the nature and cause of prenatal death.

The Atlas includes more than 2000 illustrations in color,with abrief text of essential concepts and comments. Generous use of tables is made to replace more extensive text and important references are given at the end of each chapter.

A catalog of genetic syndromes with updated references is available through OnLine Mendelian Inheritance in Man OMIM (http://www3.ncbi.nlm.nih.gov/ omim/). In general, OMIM does not provide specific testing sites but often discusses the potential for molecular testing and gives references that can be used to contact experts in the field.

It is our hope that this volume will be a useful reference for obstetricians engaged in fetalmaternal and reproductive medicine, geneticists, pediatricians – neonatologists, in particular, and pathologists who have an interest in pediatric and genetic pathology.