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Animal Science Database

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Abstract

Expanded use of artificial insemination (AI) and/or adoption of emerging reproductive technologies for beef heifers and cows require precise methods of estrous-cycle control. New protocols for inducing and synchronizing a fertile estrus in replacement beef heifers and postpartum beef cows in which...

Author(s)
Patterson, D. J.; Thomas, J. M.; Martin, N. T.; Nash, J. M.; Smith, M. F.
Publisher
Elsevier Inc, New York, USA
Citation
Veterinary Clinics of North America, Food Animal Practice, 2013, 29, 3, pp 591-617
Abstract

Two long-term, CIDR-based estrus synchronization protocols were evaluated among Bos indicus-influenced and Bos taurus beef heifers. Treatments were evaluated on the basis of estrous response and pregnancy rate resulting from fixed-time artificial insemination (FTAI), and these outcomes were...

Author(s)
Thomas, J. M.; Locke, J. W. C.; Bishop, B. E.; Abel, J. M.; Ellersieck, M. R.; Yelich, J. V.; Poock, S. E.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 92, pp 190-196
Abstract

This experiment compared 2 long-term controlled internal drug release (CIDR)-based protocols to synchronize estrus before fixed-time artificial insemination (FTAI) in postpartum beef cows. Cows were assigned to treatments by age, BCS, and days postpartum. Cows assigned to the 14- to 19-d CIDR-PGF ...

Author(s)
Martin, N. T.; Thomas, J. M.; Nash, J. M.; Mallory, D. A.; Ellersieck, M. R.; Poock, S. E.; Smith, M. F.; Patterson, D. J.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2014, 92, 4, pp 1759-1767
Abstract

Maximizing reproductive efficiency depends upon whether a heifer attains puberty before the start of the breeding season, conceives early in the breeding season, calves unassisted, raises the calf to the time it is marketed, and the heifer/cow must conceive to calve early during the subsequent...

Author(s)
Lamb, G. C.; Smith, M. F.; Perry, G. A.; Atkins, J. A.; Risley, M. E.; Busch, D. C.; Patterson, D. J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2010, 44, 1, pp 18-26
Abstract

The objective of the experiment was to compare pregnancy rates resulting from fixed-time AI after administration of either 1 of 2 controlled internal drug release (CIDR)-based protocols. Heifers at 3 locations (location 1, n=78; location 2, n=61; and location 3, n=78) were assigned to 1 of 2...

Author(s)
Busch, D. C.; Wilson, D. J.; Schafer, D. J.; Leitman, N. R.; Haden, J. K.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2007, 85, 8, pp 1933-1939
Abstract

This experiment was conducted to compare pregnancy rates in postpartum beef cows resulting from fixed-time AI (FTAI) after treatment with controlled internal drug release (CIDR)-based protocols to synchronize estrus. Cows assigned to the Show-Me-Synch (n=167) protocol received a CIDR from d 0 to...

Author(s)
Nash, J. M.; Mallory, D. A.; Ellersieck, M. R.; Poock, S. E.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2012, 132, 1/2, pp 11-16
Abstract

Two experiments evaluated long-term progestin-based estrus-synchronization programs on the basis of potential for use in facilitating fixed-time AI in estrous cycling and prepubertal beef heifers. In Exp. 1, heifers were assigned to 1 of 2 treatments by age, BW, and estrous cyclicity status....

Author(s)
Mallory, D. A.; Wilson, D. J.; Busch, D. C.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2010, 88, 11, pp 3568-3578
Abstract

Two experiments were conducted to examine the necessity of adding a GnRH injection to a 14-d controlled internal drug release (CIDR)-based protocol for synchronization of estrus and ovulation in postpartum beef cows. The experiments were designed to characterize long-term CIDR-based protocols in...

Author(s)
Nash, J. M.; Mallory, D. A.; Ellersieck, M. R.; Poock, S. E.; Smith, M. F.; Patterson, D. J.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2013, 91, 7, pp 3168-3176
Abstract

Two experiments evaluated long-term controlled internal drug release (CIDR) insert-based protocols to synchronize estrus and compare differences in their potential ability to facilitate fixed-time artificial insemination (FTAI) in beef heifers. In Experiment 1 estrous cycling heifers (n=85) were...

Author(s)
Leitman, N. R.; Busch, D. C.; Mallory, D. A.; Wilson, D. J.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2009, 114, 4, pp 345-355
Abstract

Since its formation, the Beef Reproduction Task Force (BRTF) has worked to enhance productivity and profitability of US beef herds by integrating research and extension efforts with the intent of more effectively transferring the use of reproductive technologies to the field. A key early step was...

Author(s)
Johnson, S. K.; Funston, R. N.; Hall, J. B.; Kesler, D. J.; Lamb, G. C.; Lauderdale, J. W.; Patterson, D. J.; Perry, G. A.; Strohbehn, D. R.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2011, 89, 9, pp 2950-2954

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