B.S. Dairy Science, Delaware Valley College of Agriculture and Life Sciences, Doylestown, PA, 1992.
M.S. Dairy Science (Animal Physiology), Virginia Tech., Blacksburg, VA, 1994.
Ph.D. Animal Physiology, Virginia Tech., Blacksburg, VA, 1998.
Selected Publications
Book Chapter 1
Stevenson, J.S. and A. Ahmadzadeh. Replacement Management-Cattle: Breeding standards and pregnancy maintenance. In Encyclopedia of Dairy Sciences. H. Roginski [eds.]. 2010. Academic Press.
Refereed Journals (1 corresponding author, * graduate student advisee)
Dalton J.C, L. Deragon, J.L.M. Vasconcelos, C.N. Lopes, R.F.G Peres, A. Ahmadzadeh. 2011. Fertility-associated antigen on Nelore bull sperm and reproductive outcomes following first-service fixed-time AI of Nelore cows and heifers. Theriogenology (in press, doi:10.1016/j.theriogenology.2011.08.011
Gunn, D.,
A. Ahmadzadeh1,
and B. Glaze. 2011.Effect of Duration of Progesterone Releasing Device (CIDR) Treatment on Reproductive Performance in Beef Cows .Prof. Anim. Sci.27:147-151
.
*Howard, J. M. D. G. Falk, K. G. Carnahan, J. C. Dalton, R. C. Chebel, and
A. Ahmadzadeh1. 2009. The Use of GnRH in a progesterone-based timed artificial insemination protocol in replacement beef heifers. Prof. Anim. Sci. 25:757-761.
Ahmadzadeh, A1., F. Frago, B. Shafii, J.C. Dalton, W.J. Price, M. A. McGuire. 2009. Effect of clinical mastitis and other diseases on reproductive performance of Holstein cows. Anim. Reprod. Sci. 112:273-282.
Stevenson, J. L., J. C. Dalton, J. E. P. Santos, R. Sartori,
A. Ahmadzadeh, and R. C. Chebel. 2008. Effect of Synchronization Protocols on Follicular Development and Estradiol and Progesterone Concentrations of Dairy Heifers. J. Dairy Sci. 91: 3045-3056.
*Howard, J. M., R. Manzo, F. Frago, D. G. Falk, J. B. Glaze, Jr, J. C. Dalton, and
A. Ahmadzadeh1. 2007. Estradiol cypionate did not affect pregnancy rates of beef cattle synchronized with a modified timed artificial insemination protocol. Prof. Anim. Sci.23:509-512.
Ahmadzadeh, A1., R. Manzo, C. B. Sellars, and J. C. Dalton. 2007. The efficacy of a reduced dose of gonadotropin releasing hormone on the incidence and time of ovulation in Holstein cows. J. Anim. Vet. Adv.6:1328-133.
*Howard, J. M., R. Manzo, F. Frago, D. G. Falk, J. B. Glaze, Jr, J. C. Dalton, and
A. Ahmadzadeh1. 2007. Estradiol cypionate did not affect pregnancy rates of beef cattle synchronized with a modified timed artificial insemination protocol. Prof. Anim. Sci.23:509-512.
*Frago, F, R. Manzo, J. C. Dalton, M. A. McGuire, and
A. Ahmadzadeh1.
2007. Naloxone increases serum calcium concentrations after parturition in multiparous Holstein cattle
. Prof. Anim. Sci
. 23:70-74
.
Peer-reviewed Proceeding
Autran, C. A., A. Ahmadzadeh1, J. C. Dalton. 2011. Does pure dinoprost tromethamine (prostaglandin f2α) inhibit growth in vitro of staphylococcus aureus associated with bovine mastitis? . In: Proc. Western Section of American Society of Animal Science.62:25.
Hall, J. B. A. Ahmadzadeh, R.H. Stokes, C. Stephenson, and J. K. Ahola. 2010. Impact of gender-selected semen on AI pregnancy rates, gender ratios, and calf performance in crossbred postpartum beef cows. In Proc. 8th International Ruminant Reproduction. Alaska, USA. Pg 177.
Ahmadzadeh A, and J. C. Dalton. 2010. Impact of Metabolic Disorders and Mastitis on Reproduction. In: Proc. Dairy Cattle Reproduction Conferencel, November, Pg 101.
Dalton, J. C. and
A. Ahmadzadeh. 2010. AI Technician Management In: Proc.. Dairy Cattle Reproduction Conference, November, Pg 35.
Ahmadzadeh A., M. A. McGuire, and J. C. Dalton. 2010. Interaction between clinical mastitis, other diseases and reproductive performance in dairy cows. In: Proc. Advances in Dairy Technology, Western Canadian Dairy Seminar. 22:83.
Hall, J. B.,
A. Ahmadzadeh, R. H. Stokes, J. K. Ahola, C. Stephenson, J. J. England, and J. B. Glaze, Jr. 2009. Effect of targeted use of a controlled internal drug releasing device (CIDR) in an estrous synchronization system for postpartum beef cows. In: Proc. Western Section of American Society of Animal Science. 60:257.
Research Projects
Reproductive efficiency is an important contributor to dairy farm profitability. Unfortunately, the reproductive performance of dairy cattle has declined steadily over the last few decades, as evidenced by decreased estrous detection rates, decreased conception rates, and increased number of services per conception. In my research program I emphasize applied research that has a direct impact on reproductive efficiency and management of dairy cows. My research is in the area of applied cattle reproduction with an emphasis on fertility, and management.
The focus of my research is to develop a systematic breeding program for dairy cattle to increase fertility rates and improve reproductive and economic advantages of artificial insemination (AI) on dairy farms. Using exogenous reproductive hormones (gonadotropin-releasing hormone, prostaglandin F2a,, estradiol-17b, progesterone), we attempt to develop new systematic breeding program (or improve upon the existing breeding program) to provide an organized and efficient approach to administering artificial insemination and improving reproductive efficiency in cattle through increasing heat detection efficiency and enhancing conception rate.
Other areas of research include:
• Examining the role of environment, management, and diseases on cattle reproduction
• Interaction between nutrition and reproduction
• Enhancing conception rate by reducing early embryonic loss
In continuing our research efforts on reproductive efficiency and management, I extensively collaborate with University of Idaho dairy extension specialists, Dr. Joe Dalton and reproductive physiologist Dr. Tracy Davis. Our research program is based on applied research addressing the existing issues on farms and those that have direct implications on practical reproductive management.
Awards and Honors
Recipient of Faculty Excellence Award, University of Idaho and Washington State University Naval ROTC., 2011
Recipient of Western Section of American Society of Animal Science Distinguished Teacher Award, 2010
Recipient of the Regional USDA Food and Agriculture Sciences Excellence in Teaching Awards, National Association of State Universities and Land-Grant Colleges (NASULGC), 2007
Recipient of Outstanding Academic Advisor CALS, University of Idaho, 2007
Recipient of the University Teaching Excellence Award, University of Idaho, 2006
Recipient of R. M. Wade Teaching Excellence Award, College of Agricultural and Life Sciences. University of Idaho, 2004