S. E. Echternkamp

Effects of insulin, insulin-like growth factor I, and gonadotropins on bovine granulosa cell proliferation, progesterone production, estradiol production, and(or) insulin-like growth factor I production in vitro1

L. J. Spicer, Elodia María Rivas Alpízar, S. E. Echternkamp · Journal of Animal Science · 1993 · 326 citations

Life Sciences, Animal Sciences, Endocrinology +13

Puberty in Beef Bulls: Hormone Concentrations, Growth, Testicular Development, Sperm Production and Sexual Aggressiveness in Bulls of Different Breeds1

D. D. Lunstra, J. J. Ford, S. E. Echternkamp · Journal of Animal Science · 1978 · 264 citations

Veterinary Medicine, Animal Sciences, Veterinary Physiology +16

Concentrations of Insulin-Like Growth Factor-I in Blood and Ovarian Follicular Fluid of Cattle Selected for Twins1

S. E. Echternkamp, L. J. Spicer, K. E. Gregory et al. · Biology of Reproduction · 1990 · 232 citations · Full text

Medicine, Animal Sciences, Endocrinology +13

Levels of insulin-like growth factor (IGF) binding proteins, luteinizing hormone and IGF-I receptors, and steroids in dominant follicles during the first follicular wave in cattle exhibiting regular estrous cycles.

Robert E. Stewart, L. J. Spicer, T D Hamilton et al. · Endocrinology · 1996 · 152 citations

Medicine, Animal Sciences, Endocrinology +15

Relationships among Concentrations of Steroids, Insulin-like Growth Factor-I, and Insulin-like Growth Factor Binding Proteins in Ovarian Follicular Fluid of Beef Cattle1

S. E. Echternkamp, H. J. Howard, A. J. Roberts et al. · Biology of Reproduction · 1994 · 144 citations · Full text

Life Sciences, Animal Sciences, Endocrinology +17