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Michael L Day
Professor Education: M.S. – University of Nebraska – 1982 B.S. – University of Missouri – 1980 Discipline(s): Courses Taught: Advanced Reproductive Physiology (AS 710) Grants & Awards: 2007. Influence of prostaglandin F2α treatment on reproductive performance with the 5-d CO-Synch + CIDR program in female cattle. M.L. Day and J. Hall (Virginia Tech). Select Sires, IVX Animal Health and Pfizer Animal Health. $35,672. 2006. Influence of a 5- day CO-Synch + CIDR synchronization protocol on reproductive performance in postpartum cows and heifers. M.L Day, J. Hall (Virginia Tech) and D. Whittier (Virginia Tech). Select Sires, Phoenix Scientific and Pfizer Animal Health. $36,840. 2006. Impact of long-term genetic selection for age at puberty on postpartum reproductive physiology in cows. Beef CRC, Australia. M.L. Day, C.R. Morris and M.J. D’Occhio. $32,470. 2005. Determining if luteolysis and reproductive performance are influenced by time of PGF2α and/or progestin withdrawal in postpartum beef cows receiving a Select Synch or a CO-Synch synchronization program. M. L. Day. Select Sires, Phoenix Scientific and Pfizer Animal Health. $27,000. 2004. Influence of timing of luteal regression on fertility of cattle synchronized with GnRH, CIDR and prostaglandin. M. L. Day. Select Sires, Phoenix Scientific and Pfizer Animal Health. $25,000. 2003-2007. Twin births in cattle: Development of systems to induce twinning and factors responsible for the occurrence of twin births in cattle. M. L. Day. OARDC Competitive Grants Program, Industry Matching Program with Kamiasahi Feedlot, Ltd., Obihiro, Japan. $71,616. 2000 - 2005. Early maturation of the endocrine axis in heifers. M. L. Day and J. E. Kinder. USDA-NRICGP. Funded, $200,000. 2000 – 2003. Comparison of fat deposition pattern, feedlot performance and carcass characteristics of Wagyu and Angus cattle. M. L. Day (PI), H. Zerby, F. Fluharty, S. Loerch. Manno Chikusan Co. Ltd, Osaka, Japan. Funded, $15,000.
Publications: Day, M.L., C.R. Burke, V.K. Taufa, A.M. Day and K.L. Macmillan. 2000. The strategic use of estradiol to enhance fertility and submission rates of progestin based estrus synchronization programs in seasonal dairy herds. J. Anim. Sci. 78:523-529. Burke, C.R., M.L. Day, C.R. Bunt and K.L. Macmillan. 2000. Use of a small dose of estradiol benzoate during diestrus to synchronize development of the ovulatory follicle in cattle. J. Anim. Sci. 78:145-151. DeJarnette, J.M., M.L. Day, R.B. House, R.A. Wallace and C.E. Marshall. 2001. Effect of GnRH pretreatment on reproductive performance of postpartum suckled beef cows following synchronization of estrus using GnRH and PGF2. J. Anim. Sci. 79:1675-1682. Burke, C.R., M.L. Mussard, D.E. Grum and M.L. Day. 2001. Effects of maturity of the potential ovulatory follicle on the provocation of oestrus and ovulation in cattle with oestradiol benzoate. Anim. Reprod. Sci., 66:161-174. Rhodes, F.M., C.R. Burke, B.A. Clark, M.L. Day and K.L. Macmillan. 2002. Effect of treatment with progesterone and oestradiol benzoate on ovarian follicular turnover in postpartum anoestrus cows and cows which have resumed oestrous cycles. Anim. Reprod. Sci. 69:139-150. Burke, C. R., M.L. Mussard, C.L. Gasser, D.E. Grum, M.L. Day. 2003. Estradiol benzoate delays new follicular wave emergence in a dose dependent manner after ablation of the dominant ovarian follicle in cattle. Theriogenology, 60:647-658. Day, M.L. 2004. Hormonal induction of estrous cycles in anestrous, Bos taurus beef cows. Anim. Reprod. Sci. 82-83:487-494. Johnson, S. K., and M.L. Day. 2004. Methods to reduce or eliminate detection of estrus in a melengestrol acetate - PGF2a protocol for synchronization of estrus in beef heifers. J. Anim. Sci. 82:3071-3076. Burke, C.R., H. Cardenas, M.L. Mussard, and M.L. Day. 2005. Histological and steroidogenic changes in dominant ovarian follicles during oestradiol-induced atresia in heifers. Reproduction 129:611-620. Larson, J. E., G. C. Lamb, J. S. Stevenson, S. K. Johnson, M. L. Day, T. W. Geary, D. J. Kesler, J. M. DeJarnette, F. N. Schrick, A. DiCostanzo and J. D. Arseneau. 2006. Synchronization of estrus in suckled beef cows before detected estrus and (or) timed artificial insemination using gonadotropin-releasing hormone (GnRH), prostaglandin F2α (PG), and progesterone (CIDR). J. Anim. Sci. 84:332-342. Burke, C. R., H. Cardenas, M. L. Mussard, C. L. Gasser, and M. L. Day. 2006. Steroidogenic changes and expression of messenger RNA encoding steroidogenic enzymes, gonadotrophin receptors and cell-death signalling in the dominant ovarian follicle during oestradiol-induced atresia in cattle. Anim. Reprod. Sci. 99:244-257. Gasser, C. L., D. E. Grum, M. L. Mussard, J. E. Kinder, and M. L. Day. 2006. Induction of precocious puberty in heifers I: Enhanced secretion of luteinizing hormone. J Anim Sci 84: 2035-2041. Gasser, C. L., C. R. Burke, M. L. Mussard, E J. Behlke, D. E. Grum, J. E. Kinder, and M. L. Day. 2006. Induction of precocious puberty in heifers II: Advanced ovarian follicular development. J. Anim. Sci. 84:2042-2049. Gasser, C. L., G. A. Bridges, M. L. Mussard, D. M. Dauch, D. E. Grum, J. E. Kinder and M. L. Day. 2006. Induction of precocious puberty in heifers III: Hastened reduction of estradiol negative feedback on secretion of luteinizing hormone. J. Anim. Sci.84:2050-2056. Gasser, C. L., E. J. Behlke, D. E. Grum, and M. L. Day. 2006. Effect of timing of feeding a high-concentrate diet on growth and attainment of puberty in early-weaned heifers. J. Anim. Sci. 84:3118-3122. Lamb, G. C., J. E. Larson, T. W. Geary, J. S. Stevenson, S. K. Johnson, M. L. Day, R. P. Ansotegui, D. J. Kesler, J. M. DeJarnette, and D. G. Landblom. 2006. Synchronization of estrus and artificial insemination in replacement beef heifers using gonadotropin-releasing hormone, prostaglandin F2α, and progesterone. J. Anim. Sci. 84:3000 - 3009. Mussard, M. L., C. R. Burke, E. J. Behlke, C. L. Gasser, and M. L. Day. 2007. Influence of premature induction of an LH surge with GnRH on ovulation, luteal function and fertility in cattle. J. Anim. Sci. 85:937-943. Book Chapters (2000-2007) Day, M. L. and Geary, T. W. 2005. Handbook of Estrous Synchronization. Western Region Publication No. 014, Multi-State USDA Regional Project W-112 (Reproductive Performance in Domestic Ruminants). pp. 1-41: http://www.oardc.ohio-state.edu/estroussynch/western014.pdf. Day M. L. and D. E. Grum. 2005. Breeding strategies to optimize reproductive efficiency in beef herds. In: Veterinary Clinics of North America: Food Animal Practice. Vol. 21/2, pp. 367-381. Day, M. L. and C. R. Burke. 2002. Management of follicular growth with progesterone and estradiol within progestin – based estrous synchrony systems. In: M. J. Fields, R. S. Sand and J. V. Yelich (ed.) Factors Affecting Calf Crop, Biotechnology of Reproduction. p 101. CRC Press, New York, NY. Conference Proceedings ()2000-2007). Day, M. L. and C. R. Burke. 2000. Management of follicular growth with progesterone and estradiol within progestin – based estrous synchrony systems. Proceedings of the 49th Annual Beef Cattle Short Course, Gainesville, Fl. pp. 7-18. Day, M. L. 2001. Use of progesterone to induce and synchronize estrus; application of the CIDR. In the National Association of Animal Breeders Symposium: Improving Reproductive Performance. Proceedings of the 2001 Meeting of the Beef Improvement Federation, San Antonio, TX, pp. 13-25. Burke C. R. and M. L. Day. 2001. Use of progesterone to induce and synchronize estrus in cattle: application of CIDR technology. Proceedings of the XXV Congress Nacional de Buiatria, Veracruz, Mexico, August 16-18. Day, M. L. and C. R. Burke. 2001. Estrous synchronization systems in cattle: influence of management and body condition. Proceedings of the Second Annual Beef Cattle Shortcourse, Obihiro, Japan, August, 2001:1. Day, M. L. and D. E. Grum. 2003. Estrous synchronization in heifers. Proceedings of the Ann. Conf. of the Soc. for Theriogenology: 145-154. Mussard, M. L., C. R. Burke and M. L. Day. 2003. Ovarian follicle maturity at induced ovulation influences fertility in cattle. Proceedings of the Ann. Conf. of the Soc. for Theriogenology: 179-185. Day, M. L. 2005. Understanding the physiology of anestrus to determine hormone therapies to induce onset of estrous cycles. 2005. Proceedings of the IX Course on New Approaches to Production and Reproduction in Cattle: 183-190. Uberlandia, Brazil, March 17-18, 2005. Day, M.L. 2005. Effects of strategies to synchronize ovulation on follicular development and fertility. 2005. Proceedings of the IX Course on New Approaches to Production and Reproduction in Cattle: 217-228. Uberlandia, Brazil, March 17-18, 2005. Day, M.L. 2005. Estrus synchronization protocols frequently utilized on heifers in the USA. Proceedings of the IX Course on New Approaches to Production and Reproduction in Cattle: 247-257. Uberlandia, Brazil, March 17-18, 2005. Bridges, G.A. and M.L. Day. 2006. Impact of reproductive steroid hormone concentrations on fertility in cattle. Proceedings of the X Course on New Approaches to Production and Reproduction in Cattle: 175-191. Uberlandia, Brazil, March 16-17, 2006. Day, M.L. and C.R. Burke. 2006. Actions of exogenous estradiol to coordinate follicular growth, estrus and ovulation. Proceedings of the X Course on New Approaches to Production and Reproduction in Cattle: 128-139. Uberlandia, Brazil, March 16-17, 2006. Day, M.L., C.L. Gasser and D.E. Grum. 2006. Determinants of age at puberty in heifers. Proceedings of the X Course on New Approaches to Production and Reproduction in Cattle: 86-106. Uberlandia, Brazil, March 16-17, 2006. Abstracts (32 published, 2000 – 2007). Species: Dr. Day’s research program in reproductive physiology emphasizes the study of puberty, regulation of follicular development and estrous synchronization in cattle. He also serves as Faculty Supervisor of the OSU Beef Center. |
323 Plumb Hall 2027 Coffey Road Columbus OH 43210
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