Steven Henry Umberger

Melengestrol acetate and norgestomet for the induction of synchronized estrus in seasonally anovular ewes

Gul A. Jabbar, Steven Henry Umberger, Gregory S. Lewis · Journal of Animal Science · 1994 · 36 citations

Control of Internal Parasites in Sheep

W. Dee Whittier, Anne M. Zajac, Steven Henry Umberger · VTechWorks (Virginia Tech) · 2009 · 33 citations

Effects of accelerated growth during rearing on reproduction and lactation in ewes lambing at 13 to 15 months of age

Steven Henry Umberger, L. Goode, E.V. Caruolo et al. · Theriogenology · 1985 · 28 citations

Animal Physiology, Developmental Biology, Fertility +12

Comparison of ivermectin formulations in an ovine parasite control programme

Anna Zimny-Zając, Craig D. Thatcher, Richard Brock et al. · Veterinary Record · 1992 · 18 citations

Animal Physiology, Ivermectin Formulations, Animal Science +9

Use of the point-score system for breeding soundness examination in yearling Dorset, Hampshire and Suffolk rams

William B. Ley, D.J. Sprecher, Craig D. Thatcher et al. · Theriogenology · 1990 · 14 citations

Animal Performance, Suffolk Rams, Bioacoustics +6