Facts101 is your complete guide to A Childs World , Infancy Through Adolescence. In this book, you will learn topics such as Forming a New Life: Conception, Heredity, and Environment, Pregnancy and Prenatal Development, Birth and the Newborn Baby, and Physical Development and Health during the First Three Years plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.