Анотация: The acceptance of this text has again exceeded all expectations, and the cooperation of colleagues worldwide in aiding with corrections and additional material is hereby recognized. I have not changed all anatomical terminology to some of the latest terms because I believe they are not generally accepted, but I have used some of the never terms. The preparation on this book would have been impossible without the cooperation of faculty, interns, and students in the Veterinary Clinic at Colorado State University. This edition has a section on evaluation of stallion semen in Chapter 3 that will be of great aid to practitioners doing breeding soundness examination in stallions. (O. R. Adams)