The development of the ear in the embryo and the molecular factors that influence its formation will be described in six chapters that span the period between otic placode and functional ear. The book will interest scientists who study inner ear biology, as well as developmental biologists who work in other systems but have an interest in a review of the field of work on the developing ear as well. This book might also be useful for clinicians who wish to know more about the development of the ear and about the genetic and molecular factors that regulate its formation.