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Abstract

Using a 5-d controlled internal drug-release (CIDR)-Cosynch resynchronization protocol, the objective of this study was to determine the effect of the initial GnRH injection on pregnancy per artificial insemination (P/AI) to the second artificial insemination in lactating Holstein dairy cows. On...

Author(s)
Spencer, J. A.; Carnahan, K.; Shafii, B.; Price, W. J.; Dalton, J.; Ahmadzadeh, A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 9, pp 8524-8531
AbstractFull Text

Failure to become pregnant is the primary reason for a dairy cow to be culled from the production herd. A cow that is cycling normally, with no reproductive abnormalities, but has failed to conceive after at least three successive inseminations may cause economic losses in dairy farms. The present...

Author(s)
Arslan, K.; Akyüz, B.; Akçay, A.; Ilgar, E. G.; Macun, H. C.; Çınar, M. U.
Publisher
Veterinarska Fakulteta, Univerza v Ljubljani, Ljubljana, Slovenia
Citation
Slovenian Veterinary Research, 2017, 54, 2, pp 91-98
Abstract

The widespread use of artificial insemination has allowed the expansion of genetic progress. However, it also brought consequences such as the expansion of lethal hereditary diseases and the increase in inbreeding. The object of this study was to establish a fast and sensitive molecular assay to...

Author(s)
Federici, M. T.; Sica, A. B.; Artigas, R.; Briano, C.; Dutra, F.; Llambí, S.
Publisher
Universidade Federal do Paraná, UFPR, Palotina, Brazil
Citation
Archives of Veterinary Science, 2018, 23, 4, pp 1-9
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

The study aimed to evaluate the effect of one or two prostaglandin doses F2α (PGF2a) with or without equine chorionic gonadotropin (eCG) in the follicular dynamics, the preovulatory luteal function, as well as the structural and functional characteristics post-ovulatory of the corpus luteum (CL) in ...

Author(s)
Rodrigues, A. S.; Silva, M. A. A.; Brandão, T. O.; Nascimento, A. B.; Bittencourt, R. F.; Chalhoub, M.; Bittencourt, T. C. B. S. C.; Ribeiro Filho, A. de L.
Publisher
Colégio Brasileiro de Patologia Animal, Rio de Janeiro, Brazil
Citation
Pesquisa Veterinária Brasileira, 2018, 38, 8, pp 1518-1527
Abstract

The objectives of the current study were to evaluate the effects of supplemental progesterone after artificial insemination (AI) on expression of IFN-stimulated genes (ISG) in blood leukocytes and fertility in lactating dairy cows. Weekly cohorts of Holstein cows were blocked by parity (575...

Author(s)
Monteiro, P. L. J., Jr.; Ribeiro, E. S.; Maciel, R. P.; Dias, A. L. G.; Solé, E., Jr.; Lima, F. S.; Bisinotto, R. S.; Thatcher, W. W.; Sartori, R.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 8, pp 4907-4921
Abstract

The aim of this study was to compare the reproductive performance of dairy cows subjected to early (ER) or late (LR) resynchronization programs after nonpregnancy diagnoses based on either pregnancy-associated glycoproteins (PAG) ELISA or transrectal palpation, respectively. In addition, the...

Author(s)
Sinedino, L. D. P.; Lima, F. S.; Bisinotto, R. S.; Cerri, R. L. A.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 8, pp 4932-4941
Abstract

Chemical pregnancy testing is an alternative to traditional methods of pregnancy diagnosis (either manual palpation or ultrasound) in postpartum dairy cows and heifers. The objective was to validate a chemical pregnancy test that confers the advantages of using whole blood, rapid incubation times,...

Author(s)
Mayo, L. M.; Moore, S. G.; Poock, S. E.; Silvia, W. J.; Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 9, pp 7634-7641
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

This is the very first report that suggests high pregnancy rates can be obtained with use of the Doublesynch protocol in anestrous dairy cows. Recently, a new synchronization method has been developed (Doublesynch) that resulted in synchronized ovulations both after the first and second...

Author(s)
Öztürk, Ö. A.; Cİrİt, Ü.; Baran, A.; Ak, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2010, 73, 5, pp 568-576

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