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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 objectives were to determine the effects of one or three timed artificial insemination (AI) before natural service (NS) in lactating dairy cows not observed for detection of estrus on hazard of pregnancy, days nonpregnant, and 21-days cycle pregnancy rate. A total of 1050 lactating Holstein...

Author(s)
Lima, F. S.; Bisinotto, R. S.; Ribeiro, E. S.; Ayres, H.; Greco, L. F.; Galvão, K. N.; Risco, C. A.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2012, 77, 9, pp 1918-1927
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 determine the effect of reducing the period of follicle dominance in a timed artificial insemination (AI) protocol on pregnancy per AI (P/AI) in Holstein cows. In experiment 1, 165 cows received 2 injections of PGF at 36 and 50 d in milk (DIM). At 61 DIM, cows were assigned...

Author(s)
Santos, J. E. P.; Narciso, C. D.; Rivera, F.; Thatcher, W. W.; Chebel, R. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 7, pp 2976-2988
Abstract

The objectives of this study were to evaluate the effects of method of presynchronization and source of supplemental Se on uterine health and reproductive performance of lactating dairy cows. Holstein cows (n=512) were assigned randomly to 2 methods of presynchronization, Presynch (2 PGF2a given 14 ...

Author(s)
Rutigliano, H. M.; Lima, F. S.; Cerri, R. L. A.; Greco, L. F.; Vilela, J. M.; Magalhães, V.; Silvestre, F. T.; Thatcher, W. W.; Santos, J. E. P.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2008, 91, 9, pp 3323-3336