Laboratory - Dairy Cattle Reproduction UW-Extension

Current Graduate Students

Katie Hackbart
MS, student, January 2007 to present.
M.S. Thesis: Effects of organic trace minerals on reproductive function in lactating dairy cows.

Julio O. Giordano
Ph.D., student, October 2007 to present.
Current Ph.D. Projects: 1) pregnancy loss in lactating dairy cows; 2) optimization of systematic synchronization and resynchronization strategies for lactating dairy cows.

Former MS Students

Nicholas R. Bork
September 2006 to August 2008.
Nick received his M.S. degree in the Department of Animal Sciences at North Dakota State University. One chapter of his thesis was collaborative field trial between NDSU and UW-Madison.
M.S. Thesis: Using flax seed as a supplemental fat source for dairy cattle.
Current position: Nutrition Consultant, Standard Nutrition, Omaha, NE.

Elena Silva
December 2004 to November 2006.
M.S. Thesis: Development of strategies for resynchronizing lactating dairy cows failing to conceive to a previous artificial insemination.
Current position: Ph.D. candidate, University of Illinois

Ryan A. Sterry
June 2004 to August 2006.
M.S. Thesis: Systematic reproductive management of lactating dairy cows after first postpartum timed artificial insemination.
Current position: Polk County Dairy and Livestock Agent, University of Wisconsin-Extension.

Roy D. Wilson
July 2002 to April 2004. Co-Advised with Dr. Kent Weigel.
M.S. Thesis: Practical on-farm implementation of in vitro embryo production and sexed semen technologies.
Current position: Associate VP of Large Herds, Genex/CRI, Shawano, WI.

Humberto Rivera
July 2001 to December 2003.
M.S. Thesis: Development of hormonal protocols for synchronization of ovulation and timed artificial insemination in dairy heifers.
Current position: Reproduction Field Specialist, Accelerated Genetics, Baraboo, WI.

Maria Costanza Cordoba
October 1998 to May 2001.
M.S. Thesis: Synchronization of ovulation and fixed-time artificial insemination of dairy cattle in seasonal calving grazing-based dairy systems.
Current Position: Veterinarian, Argentina.

Former Ph.D. Students

Noelia Silva del Río
October 2002 to September, 2007. Co-Advised with Dr. Ric Grummer
Ph.D. Thesis: Epidemiology, physiology and nutritional management of twinning in dairy cattle.
Current position: University of California Cooperative Extension Tulare County Dairy Farm Advisor.

Chainarong Navanukraw
May 1999 to August 2003. Dr. Navanukraw was a Ph.D. student with D.A. Redmer and L.P. Reynolds in the Department of Animal & Range Sciences at North Dakota State University who spent three months in my laboratory learning to conduct transrectal ultrasound, collect and process blood samples, and handle lactating dairy cows. Dr. Navanukraw then returned to NDSU and conducted a dairy cattle synchronization research project as part of his Ph.D. research program. I served as a Ph.D. committee member for Dr. Navanukraw. 
Dairy Research Project: Effect of presynchronization on conception rate to a timed artificial insemination protocol in lactating dairy cows. Current Position: Professor, Department of Animal Science, Khon Khan University, Thailand.

Visiting Scientists