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Williams and D.W. Forrest Program Coordinators: Dr. Gary Williams, Texas Agricultural Experiment Station, Beeville Dr. David Forrest, Texas A&M University, College Station Dr. David Patterson, University of Missouri, Columbia Presented By: North Central Reproductive Task Force and The Texas A&M University System Including: Texas Agricultural Experiment Station Texas Cooperative Extension Texas A&M University Department of Animal Science Texas A&M University College of Veterinary Medicine and Biomedical Sciences Office of Veterinary Continuing Education CONTINUING EDUCATION The Texas Board of Veterinary Examiners has approved this program for 15 continuing education units The American Registry of Professional Animal Scientists has approved this program for 13 continuing education units ADDITIONAL COPIES Additional copies of the proceedings can be purchased for $25.00 by contacting the Department of Animal Science, 2471 TAMU, College Station, TX 77843-2471; Tel. (979) 845-3560 November 12 - 13, 2005 Memorial Student Center Texas A&M University, College Station Objectives of Applied Reproductive Strategies in Beef Cattle • Improve the understanding of the physiological processes of the estrous cycle, the procedures available to synchronize estrus and ovulation, and the proper application of these systems for AI in Bos taurus and Bos indicus-influenced cattle • Improve the understanding of biological and managerial factors that influence fertility in AI programs, including male fertility and herd health, and the use of adjunct technologies Schedule and Proceedings Contents SATURDAY, NOVEMBER 12 7:15-8:00 Registration – Morning Sessions – Synchronization of Estrus and Ovulation: Tools and Systems Moderator: Dr. David Forrest 8:00 Welcome: Dr. Gary Williams 8:10 Physiological Principles Underlying Synchronization of Estrus Dr. Mike Smith, University of Missouri ................................................................1 8:50 History, Efficacy and Utilization of Prostaglandin F2α for Estrus Synchronization Dr. James Lauderdale, Lauderdale Enterprises ................................................24 9:30 Estrus Synchronization Systems – GnRH Dr. Darrel Kesler, University of Illinois ..............................................................41 10:10 Break Moderator: Dr. Paul Harms 10:25 Review of Estrus Synchronization Systems — MGA Dr. David Patterson, University of Missouri ......................................................54 11:05 Review of Estrus Synchronization – CIDR Dr. Clifford Lamb, University of Minnesota ......................................................92 11:45 Questions for Morning Speakers 12:00-1:30 Lunch and Trade Show – Afternoon Sessions – Synchronization of Estrus and Ovulation: The Bos indicus Influence Moderator: Dr. Bruce Carpenter 1:30 Reproduction of Bos indicus Breeds and Crosses Dr. Ron Randel, Texas Agricultural Experiment Station ...............................104 2:00 Synchronization of Bos indicus-Influenced Cattle for Timed Artificial Insemination Dr. Gary Williams, Texas Agricultural Experiment Station ..........................125 2:40 Estrus Synchronization for Embryo Transfer in Bos indicus-Cattle Dr. Charles Looney, OvaGenix ..........................................................................146 3:20 Break Biological and Managerial Factors Influencing Reproductive Efficiency Moderator: Dr. Ron Randel 3:35 Nutrition and Reproduction Interactions Dr. Rick Funston, University of Nebraska .......................................................159 4:05 Development and Management of Heifers for Controlled Breeding Programs Dr. David Forrest, Texas A&M University ......................................................177 4:35 Physiology and Management of the Postpartum Suckled Cow for Controlled Breeding Programs Dr. Gary Williams, Texas Agricultural Experiment Station ..........................184 5:05 Questions for afternoon speakers 5:20 Producer Panel: Utilizing Advanced Reproductive Technologies (Dr. David Patterson, Moderator) 5:45 Adjourn SUNDAY, NOVEMBER 13 – Morning Sessions – Biological and Managerial Factors Influencing Reproductive Efficiency, Cont. Moderator: Dr. Tom Welsh, Jr. 8:00 Insemination-Related Factors Affecting Fertilization in Estrus Synchronized Cattle Dr. Richard Saacke, Virginia Tech ...................................................................199 8:40 Factors that Influence Fertility in Natural and Synchronized Breeding Programs Dr. George Perry, South Dakota State University ...........................................212 9:10 Costs and Comparisons of Estrus Synchronization Systems Dr. Sandy Johnson, Kansas State University ...................................................228 9:45 Break Herd Health Programs and Evaluation of Reproductive Potential Moderator: Dr. Floron (Buddy) Faries 10:00 Management of Infectious Reproductive Diseases in Beef Cattle Herds Dr. Steve Wikse, Texas A&M University .........................................................244 10:40 Breeding Soundness Evaluation of Beef Bulls Dr. Derry Magee, Texas A&M University ........................................................253 11:10 Procedures that Support Reproductive Management of Replacement Beef Heifers Dr. David Patterson, University of Missouri ....................................................262 11:40 Questions for Morning Speakers 12:00-1:30 Lunch and Trade Show – Afternoon Sessions – Adjunct Reproductive Technologies Dr. Duane Kraemer 1:30 Bovine Fetal Sexing with Ultrasound Dr. Brad Stroud, Stroud Veterinary Embryo Services.................................285 2:00 From Wishful Thinking To Reality: Sex Selection of Spermatozoa Mr. Juan Moreno, Genetic Resources International ......................................296 2:30 Reproductive Technologies: Technology Stacking Dr. Darrel Kesler, University of Illinois ............................................................304 3:00 Break 3:15: Cloning Bovine Embryos: Current Status and Future Application Dr. Mark Westhusin, Texas A&M University ............................................................. 309 3:45 Questions for Afternoon Speakers 4:00 Veterinary Panel: Utilizing Advanced Reproductive Technologies (Dr. Dan Posey, Moderator) 4:30 Adjourn SPEAKERS David Forrest, Ph.D., Professor, Department of Animal Science, Texas A&M University, College Station, TX; [email protected] Rick Funston, Ph.D., Assistant Professor, University of Nebraska West Central Research and Extension Center, North Platte; NE, [email protected] Sandy Johnson, Ph.D., Assistant Professor and Livestock Specialist, Kansas State University, Colby, KS; [email protected] Darrel Kesler, Ph.D., Professor, Departments of Animal Science and Veterinary Clinical Medicine, University of Illinois, Urbana-Champaign, IL; [email protected] James Lauderdale, Ph.D., Lauderdale Enterprises, Augusta, MI; [email protected] Clifford Lamb, Ph.D., Associate Professor, North Central Research and Outreach Center, University of Minnesota, Grand Rapids, MN; [email protected] Charles Looney, Ph.D., OvaGenix, Navasota, TX; [email protected] Derry Magee, D.V.M., Clinical Associate Professor, Department of Large Animal Clinical Sciences, Texas A&M University, College Station, TX; [email protected] Juan Moreno, Genetic Resources International, Navasota, TX; [email protected] David Patterson, Ph.D., Professor, Department of Animal Sciences, University of Missouri, Columbia, MO; [email protected] George Perry, Ph.D., Assistant Professor, Department of Animal Science, South Dakota State University, Brookings, SD; [email protected] Ron Randel, Ph.D., Professor, Texas Agricultural Experiment Station, Overton, TX; [email protected] Richard Saacke, Ph.D., Professor Emeritus, Department of Dairy Science, Virginia Tech, Blacksburg, VA; [email protected] Michael Smith, Ph.D., Professor, Department of Animal Sciences, University of Missouri, Columbia, MO; [email protected] Brad Stroud, D.V.M., Stroud Veterinary Embryo Services, Weatherford, TX; [email protected] Mark Westhusin, Ph.D., Associate Professor, Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station; [email protected] Steven Wikse, D.V.M., Associate Professor and Beef Cattle Extension Veterinarian, Department of Large Animal Clinical Sciences, Texas A&M University, College Station; [email protected] Gary Williams, Ph.D., Professor, Animal Reproduction Laboratory, Texas Agricultural Experiment Station, Beeville, TX; [email protected] OTHER PROGRAM CONTRIBUTORS