Book excerpt: In recent years, Fetal MR has grown continually in importance, and the brain has become the main focus of investigation. However, we lack established standards and a good knowledge of the normal MR appearance. To fill this gap is the purpose of the first part of this book, which is an MR atlas of the cerebral development of the fetus. The second part is dedicated to cerebral pathologies. It includes, for each condition, a summary of the fundamental data, the imaging findings (US and MR) in correlation with neurofetopathology and/or postnatal imaging, and a brief perspective of the prognosis.