Fertility of semen used in commercial production and the impact of sperm numbers and bacterial counts von Reicks, D.L., Levis, D.G.

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Assessment of sexual behavior and effect of semen collection pen design and sexual stimulation of boars on behavior and sperm output--a review von Levis, D.G, Reicks, D.L

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Characterization of summer infertility of sows in large confinement units von Britt, J.H., Szarek, V.E., Levis, D.G.

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Review: compilation of the scientific literature comparing housing systems for gestating sows and gilts using measures of physiology, behavior, performance, and health von McGlone, J.J, Borell, E.H. von, Deen, J, Johnson, A.K, Levis, D.G, Meunier-Salaun, M, Morrow, J, Reeves, D, Salak-Johnson, J.L, Sundberg, P.L

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An evaluation of three methods for assessing sexual behavior in boars von Levis, D. G, Ford, J. J, Christenson, R. K

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The effect of breeding facility and sexual stimulation on plasma cortisol in boars von Levis, D. G, Barnett, J. L, Hemsworth, P. H, Jongman, E

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REVIEWS: Compilation of the Scientific Literature Comparing Housing Systems for Gestating Sows and Gilts Using Measures of Physiology, Behavior, Performance, and Health von Mcglone, J.J., von Borell, E.H., Deen, J., Johnson, A.K., Levis, D.G., Meunier-Salaon, M., Morrow, J., Reeves, D., Salak-Johnson, J.L., Sundberg, P.L.

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Evaluating sexual behavior in boars von Levis, D.G, Ford, J.J, Christenson, R.K

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Effect of altering suckling intervals of early-weaned pigs on rebreeding performance of sows von Britt, Jack H., Levis, Donald G.

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REVIEWS: Compilation of the Scientific Literature Comparing Housing Systems for Gestating Sows and Gilts Using Measures of Physiology, Behavior, Performance, and Health1 von Mcglone, J.J., von Borell, E.H., Deen, J., Johnson, A.K., Levis, D.G., Meunier-Salaon, M., Morrow, J., Reeves, D., Salak-Johnson, J.L., Sundberg, P.L.

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