Willis G. Parker

The Numbers of Sertoli Cells in Mature Holstein Bulls and their Relationship to Quantitative Aspects of Spermatogenesis1

W. E. Berndtson, G. Igboeli, Willis G. Parker · Biology of Reproduction · 1987 · 81 citations · Full text

Life Sciences, Animal Sciences, Cell Biology +9

Duration of estrus and ovulation time in nonlactating mares given human chorionic gondotropin during three successive estrous periods.

John J. Sullivan, Willis G. Parker, L. L. Larson · PubMed · 1973 · 60 citations

Medicine, Animal Sciences, Endocrinology +14

Duration of Estrus and Ovulation Time in Nonlactating Mares Given Human Chorionic Gonadotropin During Three Successive Estrous Periods

John J. Sullivan, Willis G. Parker · Journal of the American Veterinary Medical Association · 1973 · 18 citations

Medicine, Animal Sciences, Reproductive Endocrinology +8

Avulsion of the bovine prepuce from its attachment to the penile integument during semen collection with an artificial vagina

Willis G. Parker, Rüdiger Braun, B. Bean et al. · Theriogenology · 1987 · 15 citations

Veterinary Medicine, Animal Sciences, Reproductive Medicine +8