Dr. Pohler's research interest focus on understanding the physiological and molecular mechanisms that control reproductive efficiency in cattle. More specifically his lab is interested in the mechanisms that lead to embryonic and fetal mortality in cattle and development of management strategies to overcome these losses. Embryonic mortality can be classified into early (< d 28 of gestation) or late (> d 28 of gestation) depending on the exact timing at which it occurs during gestation. Reports of high fertilization rates after a single insemination (~90%), followed by pregnancy rates of 60 to 70% on d 28 in cows indicate that early embryonic mortality may be 20 to 30% in beef cows. Documented causes of early embryonic mortality range from genetic abnormalities to uterine-embryo asynchrony to failure of maternal recognition of pregnancy and this has been an area of intense investigation. Late embryonic mortality (> d 28 of gestation) has been reported in both beef/dairy cattle and may vary from 3.2 to 42.7%. Currently, there is very little known about the causes of late embryonic mortality. However, the economic consequences of each unit of late embryonic mortality are greater than that of early mortality. Along with the increased economic consequences, late embryonic mortality is becoming more evident in both the beef and dairy industries based on the shift to early pregnancy diagnosis (~d28-35 of gestation).
- M.S. in Animal Science, University of Missouri - (Columbia, Missouri, United States)
- B.S. in Animal Science, Texas A&M University - (College Station, Texas, United States)
- Ph.D. in Animal Science, minor in College Teaching in Ag, University of Missouri - (Columbia, Missouri, United States)
- Stewart, J. L., Stella, S., Cunha, L. L., Dias, N. W., Canisso, I. F., Mercadante, V., ... Lima, F. S. (2020). Administration of nerve growth factor-β to heifers with a pre-ovulatory follicle enhanced luteal formation and function and promoted LH release.. THERIOGENOLOGY. 148, 37-47.
- Cooke, R. F., Cardoso, R. C., Cerri, R., Lamb, G. C., Pohler, K. G., Riley, D. G., & Vasconcelos, J. (2020). Board Invited Review - Cattle adapted to tropical and subtropical environments (II): genetic and reproductive considerations.. JOURNAL OF ANIMAL SCIENCE. 98(2),
- Oosthuizen, N., Cooke, R. F., Schubach, K. M., Fontes, P., Brandão, A. P., Oliveira Filho, R. V., ... Lamb, G. C. (2020). Effects of estrous expression and intensity of behavioral estrous symptoms on variables associated with fertility in beef cows treated for fixed-time artificial insemination.. Animal Reproduction Science. 214, 106308-106308.
- Reese, S. T., Franco, G. A., Schubach, K. M., Brandao, A. P., West, S. M., Cooke, R. F., ... Pohler, K. G. (2020). Induced prostaglandin release alters steroid concentrations but not pregnancy survival in cows.. Domest Anim Endocrinol. 74, 106514-106514.
- Reese, S. T., Franco, G. A., Poole, R. K., Hood, R., Fernadez Montero, L., Oliveira Filho, R. V., Cooke, R. F., & Pohler, K. G. (2020). Pregnancy loss in beef cattle: A meta-analysis.. Animal Reproduction Science. 212, 106251-106251.
- Jinks, E. M., Pohler, K. G., Smith, M. F., MacNeil, M. D., Roberts, A. M., Waterman, R. C., & Geary, T. W. (2011). Effect of Ovulatory Follicle Size and Estradiol Supplementation During the Preovulatory Period on Pregnancy Rates in Postpartum Beef Cows. Biology of Reproduction. 85,
- Nash, J. M., Mallory, D. A., Selby, C. C., Pohler, K. G., Ellersieck, M. R., Smith, M. F., & Patterson, D. J. (2010). Comparison of long-term progestin-based protocols to synchronize estrus in postpartum beef cows. Journal of Dairy Science. 93, 766-766.