Some abstracts do not have video files because ASAS was denied recording rights.

Physiology and endocrinology: Reproduction and estrous cycle control

Friday, July 22, 2016: 2:00 PM-5:00 PM
151 G (Salt Palace Convention Center)
Chair:
Vitor R. G. Mercadante
2:15 PM
GnRH increased pregnancy risk in suckled beef cows that did not display estrus when subjected to a split-time artificial insemination program
S. L. Hill, Kansas State University; D. M. Grieger, Kansas State University; K. C. Olson, Kansas State University; J. R. Jaeger, Western Kansas Agricultural Research Center, Kansas State University; C. R. Dahlen, North Dakota State University; M. R. Crosswhite, North Dakota State University; N. Negrin Pereira, North Dakota State University; S. R. Underdahl, North Dakota State University; B. W. Neville, North Dakota State University; J. K. Ahola, Colorado State University; M. C. Fischer, Colorado State University; G. E. Seidel, Colorado State University; J. S. Stevenson, Kansas State University
2:30 PM
Comparison of long- versus short-term CIDR-based protocols to synchronize estrus prior to fixed-time AI in primiparous two-year-old beef cows
Jillian M Abel, University of Missouri; Brianne E Bishop, University of Missouri; Jordan M Thomas, University of Missouri; Mark R Ellersieck, University of Missouri; Scott E. Poock, University of Missouri; Michael F Smith, University of Missouri; David J Patterson, University of Missouri
2:45 PM
Comparing split-time AI pregnancy rates among non-estrous heifers based on administration of GnRH at AI
Brianne E Bishop, University of Missouri; Jordan M Thomas, University of Missouri; Jillian M Abel, University of Missouri; Michael F Smith, University of Missouri; Mark R Ellersieck, University of Missouri; Scott E. Poock, University of Missouri; David J Patterson, University of Missouri
3:00 PM
Comparing fixed-time artificial insemination to split-time artificial insemination with delayed administration of GnRH in postpartum beef cows
Brianne E Bishop, University of Missouri; Jillian M Abel, University of Missouri; Jordan M Thomas, University of Missouri; Michael F Smith, University of Missouri; Scott E. Poock, University of Missouri; Mark R Ellersieck, University of Missouri; David J Patterson, University of Missouri
3:15 PM
Split-time artificial insemination following synchronization of estrus with the 14-d CIDR-PG protocol in primiparous two-year-old beef cows
Jillian M Abel, University of Missouri; Brianne E Bishop, University of Missouri; Jordan M Thomas, University of Missouri; Mark R Ellersieck, University of Missouri; Scott E. Poock, University of Missouri; Michael F Smith, University of Missouri; David J Patterson, University of Missouri
3:30 PM
Break
3:45 PM
The 9-d CIDR-PG protocol: Incorporation of prostaglandin pretreatment into a long-term, CIDR-based estrus synchronization protocol improves timed AI pregnancy rates in postpartum suckled beef cows
Jordan M Thomas, University of Missouri; Brianne E Bishop, University of Missouri; Jillian M Abel, University of Missouri; James WC Locke, University of Missouri; Scott E. Poock, University of Missouri; Michael F Smith, University of Missouri; David J Patterson, University of Missouri
4:00 PM
Requirement of GnRH administration at the onset of the 5 day CO-Synch + CIDR protocol in suckled beef cows
Tyler M. Grussing, Department of Animal Science, Iowa State University; Mike L. Day, Department of Animal Science, University of Wyoming; Bethany J. Funnell, Department of Veterinary and Clinical Sciences, Purdue University; Bo R Harstine, The Ohio State University; Emmalee J. Northrop, Department of Animal Science, South Dakota State University; George A. Perry, Department of Animal Science, South Dakota State University; Jerica J.J. Rich, Department of Animal Science, South Dakota State University; Daniel W. Shike, University of Illinois at Urbana-Champaign; Kara R. Stewart, Department of Animal Sciences, Purdue University; Patrick J. Gunn, Department of Animal Science, Iowa State University
4:15 PM
Comparison of follicular dynamics and subsequent progesterone profiles in Brahman cows with either two or three ovarian follicular waves
Rui A. d'Orey Branco, Texas A&M AgriLife Research; Don A Neuendorff, Texas A&M AgriLife Research, Texas A&M University System; Andrew W. Lewis, Texas A&M AgriLife Research; Rhonda C. Vann, MAFES - Brown Loam Experiment Station, Mississippi State University; Thomas H. Welsh, Jr., Texas A&M AgriLife Research and Department of Animal Science; Ronald D. Randel, Texas A&M AgriLife Research
4:30 PM
Effect of a progesterone-based estrous synchronization program for timed AI (TAI) on reproductive performance in a seasonal pasture-based dairy production system
Federico Randi, Teagasc Grange; Josè Maria Sanchez, School of Agriculture and Food Science, University College Dublin; Mary M Herlihy, Animal & Grassland Research and Innovation Centre, Teagasc Moorepark; David A. Kenny, Teagasc Grange; Alessio Valenza, Ceva Animal Health; Stephen Butler, Animal & Grassland Research and Innovation Centre, Teagasc Moorepark; Patrick Lonergan, School of Agriculture and Food Science, University College Dublin