Cookies on Animal Science Database

Like most websites we use cookies. This is to ensure that we give you the best experience possible.

 

Continuing to use www.cabi.org  means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use.

Animal Science Database

Supporting your research in animal production, welfare and health

 Sign up to receive our Veterinary & Animal Sciences eNewsletter, book alerts and offers direct to your inbox.

Results per page:

Search results

Abstract

The objectives of this study were to evaluate the effects of daily top-dressing (individually feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from 30±3 until 126±3 Days in milk on productive and reproductive performance in lactating dairy cows. A total of 309...

Author(s)
Toledo, M. Z.; Baez, G. M.; Garcia-Guerra, A.; Lobos, N. E.; Guenther, J. N.; Trevisol, E.; Luchini, D.; Shaver, R. D.; Wiltbank, M. C.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2017, 12, 12, pp e0189117
Abstract

There are multiple reasons for reduced fertility in lactating dairy cows. We hypothesized that one cause of reduced fertility could be the overall size of the reproductive tract, particularly the uterus, given well-established uterine functions in many aspects of the reproductive process. Thus, the ...

Author(s)
Baez, G. M.; Barletta, R. V.; Guenther, J. N.; Gaska, J. M.; Wiltbank, M. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 8, pp 1357-1366
Abstract

The common practice on most commercial dairy farms is to inseminate all cows that are eligible for breeding, while ignoring (or absorbing) the costs associated with semen and labor directed toward low-fertility cows that are unlikely to conceive. Modern analytical methods, such as machine learning...

Author(s)
Shahinfar, S.; Guenther, J. N.; Page, C. D.; Kalantari, A. S.; Cabrera, V. E.; Fricke, P. M.; Weigel, K. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 6, pp 3717-3728
Abstract

Presynchronization strategies, such as Presynch-Ovsynch and Double-Ovsynch, increase fertility to timed artificial insemination (TAI) compared with Ovsynch alone; however, simpler presynchronization strategies could reduce costs and simplify reproductive management. Lactating Holstein cows (n=601)...

Author(s)
Carvalho, P. D.; Guenther, J. N.; Fuenzalida, M. J.; Amundson, M. C.; Wiltbank, M. C.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 10, pp 6305-6315
Abstract

The relationship between energy status and fertility in dairy cattle was retrospectively analyzed by comparing fertility with body condition score (BCS) near artificial insemination (AI; experiment 1), early postpartum changes in BCS (experiment 2), and postpartum changes in body weight (BW;...

Author(s)
Carvalho, P. D.; Souza, A. H.; Amundson, M. C.; Hackbart, K. S.; Fuenzalida, M. J.; Herlihy, M. M.; Ayres, H.; Dresch, A. R.; Vieira, L. M.; Guenther, J. N.; Grummer, R. R.; Fricke, P. M.; Shaver, R. D.; Wiltbank, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 6, pp 3666-3683
Abstract

Lactating Holstein cows (n=1,456) were randomized in a 2×2 factorial design to compare the main effects of day of initiation of resynchronization after artificial insemination (AI; 32 vs. 39 d) and presynchronization with GnRH 7 d before initiation of resynchronization on fertility to timed AI...

Author(s)
Lopes, G., Jr.; Giordano, J. O.; Valenza, A.; Herlihy, M. M.; Guenther, J. N.; Wiltbank, M. C.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 6, pp 3788-3798
Abstract

Reproductive management programs that synchronize ovulation can ovulate a smaller than normal follicle, potentially resulting in inadequate progesterone (P4) concentrations after artificial insemination (AI). Ovulation of the dominant follicle of the first follicular wave with human chorionic...

Author(s)
Nascimento, A. B.; Bender, R. W.; Souza, A. H.; Ayres, H.; Araujo, R. R.; Guenther, J. N.; Sartori, R.; Wiltbank, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 5, pp 2873-2882
Abstract

The objective of this study was to compare circulating progesterone (P4) profiles and pregnancies per AI (P/AI) in lactating dairy cows bred by timed artificial insemination (TAI) following Ovsynch-56 after 2 different presynchronization protocols: Double-Ovsynch (DO) or Presynch-Ovsynch (PS). Our...

Author(s)
Herlihy, M. M.; Giordano, J. O.; Souza, A. H.; Ayres, H.; Ferreira, R. M.; Keskin, A.; Nascimento, A. B.; Guenther, J. N.; Gaska, J. M.; Kacuba, S. J.; Crowe, M. A.; Butler, S. T.; Wiltbank, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 12, pp 7003-7014
Abstract

Our objectives were to (1) compare the effect on pregnancies per artificial insemination (P/AI) of presynchronization of the estrous cycle with human chorionic gonadotropin (hCG) 7 d before resynchronization of ovulation (Resynch) initiated 25 d after timed artificial insemination (TAI) and compare ...

Author(s)
Giordano, J. O.; Wiltbank, M. C.; Guenther, J. N.; Ares, M. S.; Lopes, G., Jr.; Herlihy, M. M.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 10, pp 5612-5625
Abstract

Lactating crossbred dairy cows were synchronized to receive a timed artificial insemination (TAI), and blood samples were collected from all cows from TAI until pregnancy diagnosis 39 d after TAI (period 1), and from pregnant cows from onset of treatment until the end of the experiment (period 2)....

Author(s)
Giordano, J. O.; Guenther, J. N.; Lopes, G., Jr.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 2, pp 683-697

Refine Results

Sort Order
Author
Geographical Location
Organisms
Subject Topics