Gary England is a veterinarian specialising in animal reproduction who has worked in clinical practice and research of dog breeding for 25 years. He is Professor of Comparative Veterinary Reproduction at the University of Nottingham and has published more than 100 scientific articles and numerous book chapters and reviews in the area. He is Diplomate of the American College of Theriogenology and the European College of Animal Reproduction, as well as being an RCVS Recognised Specialist in Veterinary Reproduction. Drawing on his extensive research and clinical experience, this book represents his view of the subject area, and includes references to his own peer-reviewed publications demonstrating the impact of his contribution to the field.