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Developments in the Physiology of Reproduction of Dairy Cattle and in Artificial Insemination

American Foundation for the Study of Genetics, Madison, Wisconsin

ABSTRACT

A study of the physiology of reproduction in animals and of other fields of natural science began with the dawn of man. His existence depended upon his skill in killing animals for food, and because of this critical necessity he developed hunting lore, which included knowledge of the mating and young-bearing habits of wild life. Observations of animals recorded on walls of caves, and undoubtedly writings on natural science that have been lost, antedate Aristotle (384-322 B.C.) by as much as Aristotle antedates our time. In spite of the antiquity of natural science, man has learned more about reproduction of the bovine during the past half-century than was learned in all previous ages. This statement applies as well specifically to artificial insemination as it does generally to reproduction. Actually, little information was available concerning reproduction of cattle at the time of the founding of the American Dairy Science Association in 1906. Scientists at that time, however, were beneficiaries of a rich heritage of fundamental information concerning reproductive processes.