The aim of this text is to examine the physiological development of the fetus. It allows the reader to study the unique pharmacokinetic and metabolic features of newborns and gives specific examples of drug metabolism in the newborn. The purpose of this book is to enhance the current knowledge of pharmacology of the newborn by observing the embryo and placenta in normal and abnormal development, placental transfer of drugs, metabolic pathways, and metabolism of specific drugs such as theophylline, benzodiazepines, and antibiotics. This is a useful book for those involved in pediatric research, pharmacology, toxicology, experimental therapeutics and biology.