S
Sherrill E. Echternkamp
Researcher at Agricultural Research Service
Publications - 59
Citations - 3381
Sherrill E. Echternkamp is an academic researcher from Agricultural Research Service. The author has contributed to research in topics: Estrous cycle & Ovulation. The author has an hindex of 31, co-authored 59 publications receiving 3261 citations. Previous affiliations of Sherrill E. Echternkamp include United States Department of Agriculture & Michigan State University.
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Journal ArticleDOI
The ovarian insulin and insulin-like growth factor system with an emphasis on domestic animals
TL;DR: Evidence for a coherent mechanism by which insulin, IGFs, and IGFBPs interact and regulate ovarian function in vivo has yet to be found.
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Puberty in beef bulls: hormone concentrations, growth, testicular development, sperm production and sexual aggressiveness in bulls of different breeds.
TL;DR: Breed groups with high average T concentrations between 7 and 13 months of age reached puberty earlier than breed groups with low T concentrations, and Bulls exhibited first sexual interest approximately 3 weeks before reaching puberty, and attained mating ability approximately 6 weeks after reaching puberty.
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Concentrations of insulin-like growth factor-I in blood and ovarian follicular fluid of cattle selected for twins.
TL;DR: Investigation of the possibility that cattle selected for twin births may have increased concentrations of IGF-I within the ovarian follicle and in peripheral blood found it to be associated with intraovarian growth and differentiation.
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Relationships among concentrations of steroids, insulin-like growth factor-I, and insulin-like growth factor binding proteins in ovarian follicular fluid of beef cattle.
TL;DR: The disappearance of binding activities for IGFBP-2 and smaller-molecular-mass IGFBPs in E-A follicles suggests a possible regulatory role for IGFBBP in follicular maturation and on aromatase activity.
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Ovarian follicular growth, function and turnover in cattle: a review.
TL;DR: Preliminary data suggest that the steroidogenic capacity of large follicles changes markedly during the postpartum period, and may involve increased frequency of LH pulses in blood, altered blood flow and changes in intrafollicular steroids and proteins.