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United States Department of Agriculture

Agricultural Research Service

Andy's Full Publication List
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Andy Robert's Publications

 

Harris, H.L., Cupp, A.S., Roberts, A.J., Funston, R.N. 2008. Heifers fed soybeans or milling by-products utilization of soybeans or corn milling by-products in beef heifer development diets. Journal of Animal Science 86:476-482.

Roberts, A.J., Paisley, S.I., Geary, T.W., Grings, E.E., Waterman, R.C., MacNeil, M.D. 2007. Effects of restricted feeding of beef heifers during the postweaning period on growth, efficiency, and ultrasound carcass characteristics. Journal of Animal Science 85:2740-2745.

Waterman, R.C., Grings, E.E., Geary, T.W., Roberts, A.J., Alexander, L.J., MacNeil, M.D. 2007. Influence of seasonal forage quality on glucose kinetics for young beef cows. Journal of Animal Science 85:2582-2595.

Perry, G.A. Smith, M.F., Roberts, A.J., MacNeil, M.D. and Geary, T.W. 2007. Relationship between size of the ovulatory follicle and pregnancy success in beef heifers. Journal of Animal Science 85:684-689.

Roberts, A.J., Grings, E.E., Macneil, M.D., Waterman, R.C., Alexander, L.J., Geary, T.W. 2007. Reproductive Performance Of Heifers Offered Ad Libitum Or Restricted Access To Feed For A 140-D Period After Weaning. Proceedings Western Section of Animal Science 58:255-258.  

Roberts, A.J., Al-Hassan, M.J., Fricke, P.M., Echternkamp, S.E. 2006. Large variation in steroid concentrations and insulin-like growth factor binding proteins exists among individual small antral follicles collected from within cows at various stages of estrous cycle. Journal of Animal Science 84:2714-2724

Funston, R.N., R.J. Lipsey, T.W. Geary, and A.J. Roberts. 2005. Effect of administration of human chorionic gonadotropin after artificial insemination on progesterone concentrations of progesterone and conception rates in beef heifers. J. Anim. Sci. 83:1403-1405.

Perry, G.A., M.F. Smith, M.C. Lucy, J.A. Green, T.E. Parks, M.D. MacNeil, A.J. Roberts, and T.W. Geary. 2005. Relationship between follicle size at insemination and pregnancy success in beef cattle. Proceedings of the National Academy of Sciences 102:5268-5273.

Roberts, A.J., K.M. Klindt, and T.G. Jenkins. 2005. Effects of varying energy intake and sire breed on duration of pospartum anestrus insulin like growth factor-1 and growth hormone in mature crossbred cows. Journal of Animal Science 83:1705-1714.

Echternkamp, S.E., A.J. Roberts, D.D. Lunstra, T.H. Wise, and L.J. Spicer. 2004. Ovarian follicular development in cattle selected for twin ovulations and births. Journal of Animal Science 82:459-471.

Kane, K.K., D.E. Hawkins, G.D. Pulsipher, D.J. Denniston, C.R. Krehbiel, M.G. Thomas, M.K. Petersen, D.M. Hallford, M.D. Remmenga, A.J. Roberts, and D.H. Keisler. 2004. Effect of increasing levels of undegradable intake protein on metabolic and endocrine factors in cycling beef heifers. Journal of Animal Science 82:283-291.

Olson, J.L.., A.J. Roberts, R.P. Ansotegui, J.A. Paterson, and R.N. Funston. 2004. Efficacy of an intravaginal progesterone insert and an injection of PGF2a to advance date of breeding in postpartum beef cows while utilizing natural service. Proceedings of the Western Section, American Society of Animal Science 55:11-14.

Perry, G.A., M.F. Smith, A.J. Roberts, M.D. MacNeil, and T.W. Geary. 2004. Effect of ovulatory follicle size on pregnancy rates and fetal mortality in beef heifers. Journal of Animal Science 82(Suppl. 1):101.

Turzillo, A.M., H.C. Moore, K.S. Rajapaksa, K.A. Greer, J.B. Hoying, R.J. Collier, and A.J. Roberts. 2004. Gene expression profiling in pituitary glands of cows during the preovulatory period using bovine specific cDNA microarrays. Society for the Study of Reproduction Annual Meeting Proceedings Abstract 368.

Funston, R.N., J.L. Olson, R.J. Lipsey, T.W. Geary, and A.J. Roberts. 2003. Effect of hCG administration approximately 5 d after artificial insemination on progesterone concentrations and AI conception rates in beef heifers. Proc. West. Sec. Am. Soc. Anim. Sci. 54:251-253.

Funston, R.N., J.A. Paterson, K.E. Williams, and A.J. Roberts. 2003. Effects of body condition, initial weight, and implants on feedlot and carcass characteristics of cull cows. The Professional Animal Scientist 19:233-238.

Kojima, F.N., E.M. Bergfeld, M.E. Wehrman, A.S.. Cupp, K.E. Fike, D.Y.. Mariscal-Aguayo, T. Sanchez-Torres, M. Garcia-Winder, D.T. Clopton, A.J. Roberts, and J.E. Kinder. 2003. Frequency of luteinizing hormone pulses in cattle influences duration of persistence of dominant ovarian follicles, follicular fluid concentrations of steroids, and activity of insulin-like growth factor binding proteins. Animal Reproduction Sciences. 77:187-211.

Olson, J.L., A.J. Roberts, J.A. Paterson, and R.N. Funston. 2003. Effect of exogenous progesterone before calf removal and prostaglandin F2α on estrous response and pregnancy rates in 3-year-old beef cows. Proc. West. Sec. Am. Soc. Anim. Sci. 54:277-280.

Olson, J.L., A.J. Roberts, J.A. Paterson, and R.N. Funston. 2003. Effect of exogenous progesterone before calf removal and prostaglandin F2a on estrous response and pregnancy rates in 3-year-old beef cows. Journal of Animal Science 81(Suppl. 1):186.

Perry, G.A., M.F. Smith, M.C. Lucy, A.J. Roberts, M.D. MacNeil, and T.W. Geary. 2003. Effect of ovulatory follicle size at time of GnRN injection or standing estrus on pregnancy rates and embryonic/fetal mortality in beef cattle. Proc. Western Section ASAS 54:281-284.

Roberts, A.J. and S.E. Echternkamp. 2003. Insulin-like growth factor binding proteins in granulosa and thecal cells from bovine ovarian follicles at different stages of development. Journal of Animal Science 81:2826-2839.

Roberts, A.J. and T.G. Jenkins. 2003. Associations among circulating concentrations of IGF-1 and GH during the postpartum period with resumption of estrus, calf weights and milk production in mature crossbred cows fed varying levels of energy intake. Proceedings of the Western Section, American Society of Animal Science 54:288-290.

Funston, R.N., J.L. Olson, R.J. Lipsey, T.W. Geary, and A.J. Roberts. 2003. Effect of hCG administration approximately 5 d after artificial insemination on progesterone concentrations and AI conception rates in beef heifers. Proceedings of the Western Section, American Society of Animal Science 54:251-253.

Funston, R.N., J.A. Paterson, K.E. Williams, and A.J. Roberts. 2002. Feeding and marketing culls cows. Proc. Montana Nutrition Conf. Realistic Solutions for Maintaining the Sustainability of Montana's Livestock Industry. p. 18-23.

Roberts, A.J. and T.G. Jenkins. 2002. Effects of varying energy intake and sire breed on duration of postpartum anestrus, IGF-1 and GH in mature crossbred cows. J. Anim. Sci. 80(Suppl. 2):132.

Roberts, A.J., and T.G. Jenkins. 2002. Effects of varying energy intake and sire breed on duration of postpartum anestrus, IGF-1 and GH in mature crossbred cows. Proc. West. Sec. Am. Soc. Anim. Sci. 53:454-456.

Roberts, A.J., R.N. Funston, and G.E. Moss. 2001. Insulin-like growth factor binding proteins in the bovine anterior pituitary. Endocrine 14:399-406.

Bertolini, M., J.B. Mason, R.D. Sainz, A.J. Roberts, and G.B. Anderson. 2001. Association of IGF-1 and -2 with fetal development at days 90 and 180 of gestation for in vivo- and in vitro-derived bovine pregnancies. Theriogenology 55:347.

Smith, T. P. L., W.M. Grosse, B.A. Freking, A.J. Roberts, R.T. Stone, E. Casas, J.E. Wray, J. White, J. Cho, S.C. Fahrenkrug, G.L. Bennett, M.P. Heaton, W.W. Laegreid, G.A. Rohrer, C.G. Chitko-McKown, G. Pertea, I. Holt, S. Karamycheva, F. Liang, J. Quackenbush, and J.W. Keele. 2001. Sequence evaluation of four pooled-tissue normalized bovine cDNA libraries and construction of a gene index for cattle. Genome Res. 11:626-630.

Jenkins, T.G., C.L. Ferrell, and A.J. Roberts. 2000. Lactation and calf weight traits of mature crossbred cows fed varying daily levels of metabolizable energy. J. Anim. Sci. 78:7-14.

Roberts, A. J. and S.E. Echternkamp. 1999. Expression of insulin-like growth factor binding proteins in bovine follicles. Biol. Reprod. 60 (Suppl. 1):230.

Snyder, J. L., J.A. Clapper, A.J. Roberts, D.W. Sanson, D.L. Hamernik, and G.E. Moss. 1999. Insulin-like growth factor-I, insulin-like growth factor-binding proteins, and gonadotropins in the hypothalamic-pituitary axis and serum of nutrient-restricted ewes. Biol. Reprod. 61:219-224.

Clapper, J.A., J.L. Snyder, A.J. Roberts, D.L. Hamernik, and G.E. Moss. 1998. Estradiol increases relative amounts of insulin-like growth factor binding protein (IGFBP)-3 in serum and expression of IGFBP-2 in anterior pituitaries of ewes. Biol. Reprod. 59:124-130.

Keller, M.L., A.J. Roberts, and G.E. Seidel Jr. 1998. Characterization of insulin-like growth factor-binding proteins in the uterus and conceptus during early conceptus elongation in cattle. Biol. Reprod. 59:632-642.

Klindt, J., J.T. Yen, F.C. Buonomo, A.J. Roberts, and T. Wise. 1998. Growth, body composition and endocrine responses to chronic administration of insulin-like growth factor I and(or) porcine growth hormone in pigs. J. Anim. Sci. 76:2368-2381.

Roberts, A.J., R.N. Funston, and G.E. Moss. 1998. Associations among the insulin-like growth factor system, body composition and reproductive function.. J. Reprod. Fertil. Suppl. 54:520. Proc. Fifth International Symposium on Reproduction in Domestic Ruminants, Colorado Springs, Colorado, USA, August.

Fricke, P.M., M.J. Al-Hassan, A.J. Roberts, L.P. Reynolds, D.A. Redmer, and J.J. Ford. 1997. Effect of gonadotropin treatment on size, number, and cell proliferation of antral follicles in cows. Domest. Anim. Endo. 14:171-180.

Roberts, A.J., and R.K. Christenson. 1997. Relationships of light and heavy fetuses to uterine position, placental weight, gestational age, and fetal cholesterol concentrations. J. Anim. Sci. 75:2197-2207.

Roberts, A.J., R.A. Nugent III, J. Klindt, and T.G. Jenkins. 1997. Circulating insulin-like growth factor I, insulin-like growth factor binding proteins, growth hormone, and resumption of estrus in postpartum cows subjected to dietary energy restriction. J. Anim. Sci. 75:1909-1917.

Turzillo, A.M., A.J. Roberts, S.E. Echternkamp, and T.M. Nett. 1997. Pituitary concentrations of mRNAs encoding GnRH receptor and gonadotropin subunits during the preovulatory period in normal cows and cows selected for twinning. Biol. Reprod. 56 (Suppl. 1):119.

Clapper, J.A., J.L. Snyder, D.L. Hamernik, A.J. Roberts, and G.E. Moss. 1996. Estradiol increases relative amounts of IGF-binding protein (BP)-3 in serum and expression of BP-2 in anterior pituitaries of ewes. J. Anim. Sci. 74 (Suppl. 1):235.

Echternkamp, S.E., A.J. Roberts, and K.E. Gregory. 1996. Characterization of follicular development between cattle selected and unselected for natural twin births. Biol. Reprod. 54 (Suppl 1):188.

Funston, R.N., G.E. Seidel Jr., J. Klindt, and A.J. Roberts. 1996. Insulin-like growth factor I and insulin-like growth factor-binding proteins in bovine serum and follicular fluid before and after the preovulatory surge of luteinizing hormone. Biol. Reprod. 55:1390-1396.

Klindt, J., A.J. Roberts, F.C. Buonomo, and J.T. Yen. 1996. Chronic administration of IGF-I and pGH to pigs: Changes in serum insulin-like growth factor binding proteins (IGFBPs). Proc. 10th International Congress of Endocrinology (San Francisco; June 12-15, 1996), Vol. I, p. 452 (Abstract #P2-192).

Kojima, F.N., E.G. Bergfeld, K.E. Fike, M.E. Wehrman, A.J. Roberts, and J.E. Kinder. 1996. Insulin-like growth factor binding proteins (IGFBPs) and steroids in persistent and normal bovine ovarian follicles during growth and atresia. Biol. Reprod. 54 (Suppl 1):188.

Snyder, J.L., J.A. Clapper, A.J. Roberts, and G.E. Moss. 1996. Decreased serum concentrations of LH in undernourished ewes are associated with diminished serum IGF-I and IGF-binding proteins (BPs) -3 and -4. J. Anim. Sci. 74 (Suppl. 1):219.

Al-Hassan, M.J. and A.J. Roberts. 1995. Serum insulin-like growth factor I (IGF-I) and IGF binding proteins (IGFBPs) in Callipyge and normal sheep. J. Anim. Sci. 73 (Suppl. 2):87.

Funston, R.N., G.E. Moss, and A.J. Roberts. 1995. Insulin-like growth factor I (IGF-I) and IGF-binding proteins in bovine sera and pituitaries at different stages of the estrous cycle. Endocrinology 136:62-68.

Funston, R.N., A.J. Roberts, D.L. Hixon, D.M. Hallford, D.W. Sanson, and G.E. Moss. 1995. Effect of acute glucose antagonism on hypophyseal hormones and concentrations of insulin-like growth factor (IGF)-I and IGF-binding proteins in serum, anterior pituitary and hypothalamus of ewes. Biol. Reprod. 52:1179-1186.

Funston, R.N., G.E. Seidel, and A.J. Roberts. 1995. IGF-I and IGF binding proteins (IGFBPs) in bovine serum and follicular fluid before and after the pre-ovulatory surge of LH. Biol. Reprod. 52 (Suppl. 1):158.

Keller, M.L., G.E. Seidel Jr., and A.J. Roberts. 1995. Insulin-like growth factor binding proteins in the bovine uterus during elongation of embryos. Biol. Reprod. 52 (Suppl. 1):138.

Kojima, F.N., J. Yoo, J.E. Kinder, and A.J. Roberts. 1995. Expression of Fas antigen and insulin-like growth factor binding protein-2 (IGFBP-2) mRNA during development and regression of bovine ovarian follicles and corpora lutea. Biol. Reprod. 52 (Suppl. 1):93.

Roberts, A.J. and S.E. Echternkamp. 1995. Changes in bovine granulosa and thecal cell production of IGF binding proteins (IGFBPs) during follicular development. The Endocrine Soc. 77th Ann. Mtg., Washington, DC Abstr. #PI-215, p. 166.

Al-Hassan, M.J. and A.J. Roberts. 1994. Effect of TGFß1 on bovine thecal cell steroidogenesis in vitro. J. Anim. Sci. 72 (Suppl. 2):71.

Echternkamp, S.E., H.J. Howard, A.J. Roberts, J. Grizzle, and T. Wise. 1994. Relationships among concentrations of steroids, insulin-like growth factor-I, and insulin-like growth factor binding proteins in ovarian follicular fluid of beef cattle. Biol. Reprod. 51:971-981.

Franco, J.A., A.J. Roberts, R.N. Funston, G.E. Moss, J.E. Kinder, and D.L. Hamernik. 1994. Amounts of mRNA for insulin-like growth factor (IGF) II but not IGF-I in pituitary are affected by stage of the bovine estrous cycle. J. Anim. Sci. 72 (Suppl. 2):77.

Kojima, F.N., J. Yoo, C.W. Beattie, J.E. Kinder, and A.J. Roberts. 1994. Fas antigen mRNA expression in bovine follicles and corpora lutea. Proc. 47th Annual Symposium on Fundamental Cancer Research "Cell Death in Development and Cancer" (Houston, TX). October 11-14. Abstract No. A-4.

Roberts, A.J. and S.E. Echternkamp. 1994. In vitro production of estradiol by bovine granulosa cells: Evaluation of culture condition, stage of follicular development, and location of cells within follicles. Biol. Reprod. 51:273-282.

Roberts, A.J. and S.E. Echternkamp. 1994. Relationships between follicular fluid steroid concentrations and in vitro steroid production by bovine thecal cells. Biol. Reprod. 50 (Suppl. 1):163.

Roberts, A.J., J.M. Grizzle, and S.E. Echternkamp. 1994. Follicular development and superovulation response in cows administered multiple FSH injections early in the estrous cycle. Theriogenology 42:917-929.

Roberts, A.J., R.A. Nugent III, J. Klindt, and T.G. Jenkins. 1994. Effect of dietary energy restriction on resumption of estrus, circulating IGF-1, IGF binding proteins (IGFBPs) and GH in postpartum cows. J. Anim. Sci. 72 (Suppl. 2):79.

Echternkamp, S.E. and A.J. Roberts. 1993. Changes in follicular fluid IGFBPs associated with ovarian follicular development in cattle. Proc. 4th International Symposium on Insulin, IGFs, and Their Receptors (Woods Hole, Massachusetts; April 20-23, 1993), Abstract #31.

Funston, R.N., A.J. Roberts, D.L. Hixon, D.W. Sanson, and G.E. Moss. 1993. Concentrations of IGF-1 and IGF-binding proteins in the anterior pituitary of beef cows during the estrous cycle. 1993 Annual Report, University of Wyoming, Department of Animal Science, pp. 45-47. (Tech. Report)

Funston, R.N., A.J. Roberts, D.L. Hixon, D.W. Sanson, and G.E. Moss. 1993. Insulin-like growth factor 1 (IGF-1) and IGF binding proteins (IGF-BPs) in serum, anterior pituitary (AP), hypothalamus, and liver from beef cows. J. Anim. Sci. 71 (Suppl. 1):303.

Funston, R.N., A.J. Roberts, D.L. Hixon, D.W. Sanson, and G.E. Moss. 1993. Hypophyseal insulin-like growth factor 1 (IGF-1), IGF-binding proteins (IGF-BPs) and serum IGF-1 during the estrous cycle of cows. Biol. Reprod. 48 (Suppl. 1):185.

Funston, R.N., A.J. Roberts, D.L. Hixon, D.W. Sanson, and G.E. Moss. 1993. Insulin-like growth factor 1 and IGF-binding proteins in serum, anterior pituitary, hypothalamus, and liver from beef cows. 1993 Annual Report, University of Wyoming, Department of Animal Science, pp. 41-44. (Tech. Report)

Nugent III, R.A., T.G. Jenkins, A.J. Roberts, and J.M. Klindt. 1993. Postpartum interval is influenced by nutritional environment and biological type. USDA, ARS, ARS-71 (RLHUSMARC Beef Research, Progress Report No. 4), pp. 168-169. (Tech. Report)

Nugent, R.A. III, T.G. Jenkins, A.J. Roberts, and J. Klindt. 1993. Relationship of post-partum interval in mature beef cows with nutritional environment, biological type and serum IGF-1 concentrations. Anim. Prod. 56: 193-200.

Roberts, A.J. 1993. Estradiol production by different intrafollicular populations of bovine granulosa cells from small and large follicles. J. Anim. Sci. 71 (Suppl. 1):72.

Roberts, A.J. and S.E. Echternkamp. 1993. Superovulation of cows by initiating FSH treatments during the first few days after estrus. USDA, ARS, ARS-71 (RLHUSMARC Beef Research, Progress Report No. 4), pp. 80-82. (Tech. Report),

Roberts, A.J. and R.N. Funston. 1993. Regulation of pituitary insulinlike growth factor binding proteins (IGF-BPs) by gonadotropin releasing hormone (LHRH). Biol. Reprod. 48 (Suppl. 1):186.

Roberts, A.J., S.E. Echternkamp, J.M. Grizzle, and T. Wise. 1993. Factors involved in regulating the development of ovarian follicles in cattle. USDA, ARS, ARS-71 (RLHUSMARC Beef Research, Progress Report No. 4), pp. 83-84. (Tech. Report)

Roberts, A.J., R.A. Nugent III, T.G. Jenkins, and J.M. Klindt. 1993. The relationship of metabolic hormones, nutrition, and postpartum anestrus in different biological types of cattle. USDA, ARS, ARS-71 (RLHUSMARC Beef Research, Progress Report No. 4), pp. 85. (Tech. Report),

Grizzle, J., A. Roberts, T. Wise, and A. Saxton. 1992. Effects of human recombinant IL-1ß on bovine thecal cells. Biol. Reprod. 46 (Suppl. 1):168.

Grizzle, J., T. Wise, and A. Roberts. 1992. Bovine thecal cell steroidogenesis is affected by interleukin-1ß (hrIL-1ß). Serono Symposia "IX Ovarian Workshop. Ovarian Cell Interactions: Genes to Physiology" (Chapel Hill, NC). Abstract No. 22, p. 31.

Nugent III, R.A., A.J. Roberts, T.G. Jenkins, and J.M. Klindt. 1992. Nonparametric analysis of biological type X nutritional environment effects on postpartum interval in mature beef cows. J. Anim. Sci. 70 (Suppl. 1):151.

Roberts, A.J. and S.E. Echternkamp. 1992. Embryo production by cows treated with FSH during the early luteal phase. J. Anim. Sci. 70 (Suppl. 1):75.

Roberts, A.J., J.M. Grizzle, and T.H. Wise. 1992. Estradiol production by bovine granulosa cells from small and large follicles during the preovulatory period. 74th Ann. Mtg. Endocrine Soc., San Antonio, TX. Abstract #763, p. 242.

Roberts, A.J., J. Grizzle, and T. Wise. 1992. Superinduction of follicular development with FSH alters granulosa and thecal cell function. Serono Symposia "IX Ovarian Workshop. Ovarian Cell Interactions: Genes to Physiology" (Chapel Hill, NC). Abstract No. 65, p. 53.

Grieger, D.M., A.J. Roberts, and J.J. Reeves. 1991. Timing of the preovulatory surge of LH at oestrus does not influence conception rate in beef cattle. Anim. Reprod. Sci. 24:205-209.

Grizzle, J., A. Roberts, and T. Wise. 1991. Human recombinant interleukin 1 beta stimulates bovine thecal cell steroidogenesis in vitro. Biol. Reprod. 44 (Suppl. 1):177.

Roberts, A.J. and J.J. Reeves. 1991. Reproductive and endocrine changes in ewes actively immunized against estrogens and androgens. J. Reprod. Immunol. 19:179-195.

Roberts, A.J. and S.M. Schlitz. 1991. Regulation of bovine thecal cell steroidogenesis by transforming growth factors alpha (TGF") and beta (TGFß). Biol. Reprod. 44 (Suppl. 1):85.

Roberts, A.J. and M.K. Skinner. 1991. Transforming growth factor-" and -ß differentially regulate growth and steroidogenesis of bovine thecal cells during antral follicle development. Endocrinology 129:2041-2048.

Roberts, A.J., J.J. HernandezLedezma, J.J. Reeves, and R.W. Wright Jr. 1991. Quantity and quality of embryos collected from mice passively immunized against estradiol. Theriogenology 35:1019-1027.

Roberts, A.J. and M.K. Skinner. 1990. Estrogen regulation of thecal cell steroidogenesis and differentiation: Thecal cellgranulosa cell interactions. Endocrinology 127:2918-2929.

Roberts, A.J. and M.K. Skinner. 1990. Hormonal regulation of thecal cell function during antral follicle development in bovine ovaries. Endocrinology 127:2907-2917.

Roberts, A.J. and M.K. Skinner. 1990. Steroid mediated mesenchymal-epithelial cell interactions in the ovary: Estrogen induced theca cell differentiation. Molec. Cell Endo. 72:1-5.

Roberts, A.J., D.M. DeAvila, J.D. Gerber, and J.J. Reeves. 1990. Active immunization of beef heifers against luteinizing hormone. I. Evaluation of protein carriers and adjuvants on antigenicity of LH. J. Anim. Sci. 68:3742-3746.

Roberts, A.J., S.M. Schlitz, and M.K. Skinner. 1990. Regulation of bovine theca cell growth and differentiation by estradiol (E2) and transforming growth factors alpha (TGF") and beta (TGFß). Biol. Reprod. 42 (Suppl. 1):85.

Reeves, J.J., C.F. Chang, D.M. DeAvila, D.M. Grieger, H.J. Johnson, and A.J. Roberts. 1989. Vaccines against endogenous hormones: A possible future tool in animal production. J. Dairy Sci. 72:3363-3371.

Roberts, A.J. and J.J. Reeves. 1989. Reproductive and endocrine changes in ewes actively immunized against luteinizing hormone. J. Reprod. Immun. 16:187-197.

Roberts, A.J., C.F. Chang, A.V. Schally, and J.J. Reeves. 1989. Luteinizing hormone concentrations in serum of postpartum beef cows injected with microencapsulated luteinizing hormone-releasing hormone analog. J. Anim. Sci. 67:2730-2734.

Roberts, A.J., J.J. HernandezLedezma, J.J. Reeves, and R.W. Wright Jr. 1989. Quantity and quality of embryos collected from mice passively immunized against estradiol. J. Anim. Sci. 67 (Suppl. 1):378.

Roberts, A.J. 1988. Methods of increasing and abolishing reproduction in cattle, sheep and goats. Washington State Univ. (Ph.D. dissertation),

Roberts, A.J. and J.J. Reeves. 1988. Kidding rates of Angora goats passively immunized against estrogens. J. Anim. Sci. 66:2443-2447.

Roberts, A.J. and J.J. Reeves. 1988. Passive immunization against estrogens increases twin births in Angora goats. Proc. Canada West Soc. Reprod. Biol. 10:8.

Roberts, A.J. and J.J. Reeves. 1988. Immunization of ewes against ovarian steroids or LH. Biol. Reprod. 38 (Suppl. 1):161.

Chang, C.F., A.J. Roberts, and J.J. Reeves. 1987. Increased luteinizing hormone secretion and ovarian function in heifers actively immunized against estrogen and progesterone. J. Anim. Sci. 65:771-776.

Chang, C.F., A.J. Roberts, and J.J. Reeves. 1986. Increased luteinizing hormone secretion and ovarian function in heifers actively immunized against estradiol and progesterone. J. Anim. Sci. 63 (Suppl. 1):340.

Grieger, D.M., A.J. Roberts, and J.J. Reeves. 1986. Timing of the LH surge at estrus does not differ between cows that conceive and those that do not. J. Anim. Sci. 63 (Suppl. 1):337.

Roberts, A.J. 1986. Benefits and economics of artificial insemination. Cattlemen's Winter-school (Washington), pp. d16-d27. (Tech. Report)

Roberts, A.J., C.F. Chang, and J.J. Reeves. 1986. Methods of decreasing the postpartum interval to first estrus. Proc. Beef Research Information Day (Washington), pp. 9-11. (Tech. Report)

Roberts, A.J., T.G. Dunn, and W.J. Murdoch. 1985. Induction of ovulation in proestrous ewes: Identification of the ovulatory follicle and functional status of the corpus luteum. Dom. Anim. Endo. 2:207-210.

Roberts, A.J. 1984. Induction of ovulation in estrous and anestrous ewes. Univ. Wyoming. (Thesis).

Roberts, A.J., T.G. Dunn, and W.J. Murdoch. 1984. Induction of ovulation in proestrous and anestrous ewes: Identification of the ovulatory follicle and functional status of the corpus luteum. Proc. West. Sec. Am. Soc. Anim. Sci. 35:20-22. (Tech. Report)

Roberts, A.J., T.G. Dunn, and W.J. Murdoch. 1984. Induction of ovulation in proestrous and anestrous ewes: Identification of the ovulatory follicle and functional status of the corpus luteum. J. Anim. Sci. 59 (Suppl. 1):469.

 

USDA, ARS Fort Keogh Livestock and Range Research Laboratory
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