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Animal Science Database

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Abstract

Important developments have occurred in the last two decades, since the advent of the Ovsynch protocol, on the understanding and use of synchronisation programmes for management of reproduction in dairy herds. This better understanding of oestrus cycle control associated with suboptimal...

Author(s)
Bisinotto, R. S.; Ribeiro, E. S.; Santos, J. E. P.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2014, 8, s1, pp 151-159
Abstract

Postpartum anovulation is a natural process that is observed in most mammals, including women. In lactating dairy cows, the interval from calving to first ovulation typically averages 4 to 5 weeks, but a substantial proportion of cows have not resumed estrous cyclicity by 60 days postpartum....

Author(s)
Santos, J. E. P.; Wiltbank, M. C.; Ribeiro, E. S.; Bisinotto, R. S.
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Animal Reproduction (Belo Horizonte), 2016, 13, 3, pp 290-299
Abstract

Resumption of ovulation after parturition is a coordinated process that involves recoupling of the GH/insulin-like growth factor 1 axis in the liver, increase in follicular development and steroidogenesis, and removal of negative feedback from estradiol in the hypothalamus. Infectious diseases and...

Author(s)
Santos, J. E. P.; Bisinotto, R. S.; Ribeiro, E. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 1, pp 254-262
Abstract

Objectives were to determine the effects of GnRH at the initiation of the 5-d timed artificial insemination (AI) program combined with 2 injections of PGF on ovarian responses and pregnancy per AI (P/AI) in dairy heifers, and the role of progesterone concentrations on LH release and ovulation in...

Author(s)
Lima, F. S.; Ribeiro, E. S.; Bisinotto, R. S.; Greco, L. F.; Martinez, N.; Amstalden, M.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 11, pp 7054-7065
Abstract

The objective of this series of studies was to investigate the effects of inflammatory diseases occurring before breeding on the developmental biology and reproductive responses in dairy cows. Data from 5 studies were used to investigate different questions associating health status before breeding ...

Author(s)
Ribeiro, E. S.; Gomes, G.; Greco, L. F.; Cerri, R. L. A.; Vieira Neto, A.; Monteiro, P. L. J., Jr.; Lima, F. S.; Bisinotto, R. S.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 3, pp 2201-2220
Abstract

The objectives were to compare development and transcriptome of preimplantation conceptuses 15 d after synchronized ovulation and artificial insemination (AI) according to the genetic background of the cow and estrous cyclicity at the initiation of the synchronization program. On d 39±3 postpartum, ...

Author(s)
Ribeiro, E. S.; Monteiro, A. P. A.; Bisinotto, R. S.; Lima, F. S.; Greco, L. F.; Ealy, A. D.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 6, pp 4761-4777
Abstract

The objectives were to compare the effects of 2 methods of presynchronization and 2 lengths of proestrus on fertility of grazing dairy cows subjected to a 5-d timed artificial insemination (AI) protocol at initiation of breeding season. Lactating dairy cows (n=1,754) from 3 seasonal grazing farms...

Author(s)
Ribeiro, E. S.; Monteiro, A. P. A.; Lima, F. S.; Ayres, H.; Bisinotto, R. S.; Favoreto, M.; Greco, L. F.; Marsola, R. S.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 5, pp 2513-2522
Abstract

Objectives were to investigate 2 intervals from induction of ovulation to artificial insemination (AI) and the effect of supplemental progesterone for resynchronization on fertility of lactating dairy cows subjected to a 5-d timed AI program. In experiment 1, 1,227 Holstein cows had their estrous...

Author(s)
Bisinotto, R. S.; Ribeiro, E. S.; Martins, L. T.; Marsola, R. S.; Greco, L. F.; Favoreto, M. G.; Risco, C. A.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 12, pp 5798-5808
Abstract

The objectives were to evaluate pregnancy per AI (P/AI) of dairy cows subjected to the 5-day timed AI protocol under various synchronization and luteolytic treatments. Cows were either presynchronized or received supplemental progesterone during the synchronization protocol, and received a double...

Author(s)
Ribeiro, E. S.; Bisinotto, R. S.; Favoreto, M. G.; Martins, L. T.; Cerri, R. L. A.; Silvestre, F. T.; Greco, L. F.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2012, 78, 2, pp 273-284
Abstract

The objectives were to characterize the prevalence of periparturient diseases and their effects on reproductive performance of dairy cows in seasonal grazing farms. A total of 957 multiparous cows in 2 farms (555 in farm A and 402 in farm B) were evaluated and diseases characterized. At calving,...

Author(s)
Ribeiro, E. S.; Lima, F. S.; Greco, L. F.; Bisinotto, R. S.; Monteiro, A. P. A.; Favoreto, M.; Ayres, H.; Marsola, R. S.; Martinez, N.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 9, pp 5682-5697

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