Theriogenology is the branch of veterinary medicine concerned with reproduction, including the physiology and pathology of male and female reproductive systems of animals and the clinical practice of veterinary obstetrics, gynecology, and andrology. Theriogenologists are veterinarians with advanced training in animal reproduction and obstetrics. In the United States, most theriogenologists are board-certified by the American College of Theriogenologists. Theriogenology is the branch of veterinary medicine concerned with reproduction, including the physiology and pathology of male and female reproductive systems of animals and the clinical practice of veterinary obstetrics, gynecology, and andrology. Theriogenologists are veterinarians with advanced training in animal reproduction and obstetrics. In the United States, most theriogenologists are board-certified by the American College of Theriogenologists.