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Animal Science Database

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Abstract

A blinded, negative controlled, randomized intervention study was undertaken to test the hypothesis that addition of meloxicam, a nonsteroidal anti-inflammatory drug, to antimicrobial treatment of mild to moderate clinical mastitis would improve fertility and reduce the risk of removal from the...

Author(s)
McDougall, S.; Abbeloos, E.; Piepers, S.; Rao, A. S.; Astiz, S.; Werven, T. van; Statham, J.; Pérez-Villalobos, N.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 3, pp 2026-2042
Abstract

The objectives of this study were to (1) evaluate factors associated with variation in circulating anti-Müllerian hormone (AMH) concentrations, (2) establish an optimum AMH threshold predictive of pregnancy to first artificial insemination (P/AI), (3) examine the relationship between AMH and...

Author(s)
Gobikrushanth, M.; Purfield, D. C.; Colazo, M. G.; Butler, S. T.; Wang, Z.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 8, pp 7563-7574
Abstract

This study assessed the effects of management factors and weather at artificial insemination (AI) on fertility rate in the Florida goat breed based on 7621 artificial inseminations from 47 farms in Spain. Overall, fertility rate was 55%. Farm (P<0.0001), month (P<0.01), number of previous kiddings (P<0.05), milk production at AI (P<0.05), interval between last kidding and AI (P<0.0001), the person responsible for selecting animals for AI (P<0.05), progestagen dose (P<0.001), eCG dose (P<0.0001), sperm dose (P<0.05), site of insemination (P<0.001), incidences at AI (P<0.0001), fulfillment of AI timing schedule (P<0.0001), buck (P<0.0001), and technician (P<0.001) had a significant effect on fertility rate. Mean and maximum temperatures (T) (P<0.001) and solar radiation (SR) on the day of AI differed significantly between does that became pregnant and those that did not. After meteorological data were converted to categorical variables as deciles, the proportions of does that became pregnant were significantly higher among inseminations that were performed when...

Author(s)
Arrébola, F.; Sánchez, M.; López, M. D.; Rodríguez, M.; Pardo, B.; Palacios, C.; Abecia, J. A.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Small Ruminant Research, 2016, 137, pp 47-52
Abstract

The objective of this experiment was to evaluate the reproductive performance and herd exit dynamics of dairy cows managed for first service with programs varying in method of submission for insemination and voluntary waiting period (VWP) duration. Holstein cows from a commercial farm in New York...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1673-1686
Abstract

Research on sexed semen breeding techniques has largely focused on purebred cattle production systems and little work has been done evaluating sexed semen use in crossbred dairy cattle. Complementing a crossbreeding reproduction strategy with sexed semen artificial insemination (AI) has the...

Author(s)
Barrientos-Blanco, J. A.; Thompson, N. M.; Widmar, N. J. O.; Wolf, C. A.; Snyder, L. U.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2018, 211, pp 66-74
Abstract

Beef Quality Assurance programs have contributed to significant improvements in the wholesomeness of beef available for consumption. Injection site blemishes in the round have declined since the promotion of administering intramuscular injections in the neck. Unfortunately, many producers continue...

Author(s)
Pickworth, C. L.; Bell, L. M.; Greene, W.; Whisnant, C. S.; Poole, D. H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 87, pp 161-166
Abstract

This experiment evaluated the reproductive performance, herd exit dynamics, and lactation performance of dairy cows managed with a voluntary waiting period (VWP) of 60 or 88 d. Secondary objectives were evaluating VWP effect on cyclicity status, uterine health, systemic inflammation, and body...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 1, pp 717-735
Abstract

Author(s)
Martins, J. P. N.; Martinez, W.; Schmitt, J. S.; Ross, P. J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Proceedings of the Fifty-First Annual Conference of the American Association of Bovine Practitioners, Phoenix, Arizona, USA, September 13-15, 2018, 2018, pp 317
Abstract

The main objective of this study was to evaluate the effect of a second treatment with prostaglandin F (PGF) during Ovsynch on regression of the corpus luteum (CL) and on fertility to the timed artificial insemination. Two experiments were performed. In both experiments, cows were randomized to...

Author(s)
Wiltbank, M. C.; Baez, G. M.; Cochrane, F.; Barletta, R. V.; Trayford, C. R.; Joseph, R. T.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 12, pp 8644-8654
Abstract

Recent trends in dairy farm structure in the United States have included a decreasing number of farms, although farm size has increased, especially the share of milk production from very large herds (>2,500 cows). The objectives of this observational study were to describe common management...

Author(s)
Evink, T. L.; Endres, M. I.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 11, pp 9466-9475

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