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Preface

Animal Reproduction Laboratory, Colorado State University, Fort Collins 80523

ABSTRACT

During the past 35 yr, breeding of cattle, especially dairy cattle, has been revolutionized by the introduction and widespread use of artificial insemination. Simultaneously, needs of the artificial insemination industry stimulated research on reproductive physiology of the bull and on physiology and preservation of bovine spermatozoa. This research produced an understanding of reproductive processes of the bull and preservation of bovine spermatozoa that, until recently, far exceeded similar knowledge for any other species, including the human. Major contributions to our understanding of the reproductive capacity of the bovine male and of practical procedures for preservation of bovine spermatozoa at 5 or –196°C were a direct product of research at the Dairy Breeding Research Center of The Pennsylvania State University by John O. Almquist or by his students. Countless students were stimulated by Almquists's lucid and challenging presentations in his undergraduate course "Reproductive Physiology of Farm Animals". Many of these students continued their education elsewhere through graduate studies and have become internationally known leaders in reproductive physiology.