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Animal Science Database

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Abstract

The objective of this observational experiment was to determine the association between the interval from reaching activity threshold (AT) to artificial insemination (AI) with sex-sorted semen and the probability of pregnancy. Jersey cows (n=678) from a commercial dairy herd were fitted with...

Author(s)
Bombardelli, G. D.; Soares, H. F.; Chebel, R. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 3, pp 533-539
Abstract

The objective of the present study was to find the effect of preovulatory follicle (POF) size at the time of AI and ovulation time on pregnancy rates in 68 crossbred Jersey cows. Ovarian ultrasonography was done on day 0 (Estrus), 1, 2 11 & 27. The ovulation rate was significantly lower...

Author(s)
Ezhilarasan, C.; Murugavel, K.; Antoine, D.; Raju, M. S.
Publisher
Indian Veterinary Association, Chennai, India
Citation
Indian Veterinary Journal, 2018, 95, 5, pp 18-21
Abstract

The objective of this clinical trial was to compare conception and newborn calf sex ratios among Jersey heifers and lactating cows inseminated with either standard sex-sorted semen (low-dose, high-sort; LDHS) containing 2.1×106 sorted sperm at 90% purity or high-dose, low-sort (HDLS) semen...

Author(s)
Lucena, J. A.; Kenyon, A. G.; Reynolds, J. P.; Moreno, J. F.; Lenz, R. W.; Carroll, D.; Lehenbauer, T. W.; Champagne, J. D.; Aly, S. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 3, pp 1782-1789
Abstract

Progesterone-releasing (controlled internal drug release, CIDR) devices inserted for 14 d are used to presynchronize the estrous cycle for timed artificial insemination (TAI) in beef heifers (14-d CIDR-PGF program). The objective was to test a similar program in dairy cows by measuring...

Author(s)
Escalante, R. C.; Poock, S. E.; Mathew, D. J.; Martin, W. R.; Newsom, E. M.; Hamilton, S. A.; Pohler, K. G.; Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 1, pp 300-306
Abstract

The objective of the present study was to evaluate the effect of seasonality on the rectal temperature (RT) and conception rate (CR) of dairy cows kept in confinement, as well as the effect of rectal temperature (RT) on conception rate (CR). Three hundred thirty-three lactating cows, from a...

Author(s)
Bonato, G. L.; Leite, M. B.; Oliveira, M.; Campos, C. C.; Santos, R. M. dos
Publisher
Departmento da Producao Animal, Secretaria da Agricultura, Industria e Comercio, Sao Paulo, Brazil
Citation
Boletim de Indústria Animal, 2014, 71, 2, pp 143-146
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

The objectives of this study were to determine the efficacy of GnRH and PGF for inducing early Postpartum (PP) estrual activity, hastening uterine involution and enhancing ovulation synchronization in lactating dairy cows. About 40 Holstein and Jersey cows were assigned at calving to 1 of 3...

Author(s)
Tucker, A. L.; Sanchez, H. L.; Tucker, W. B.; Williams, A.; Fuquay, J. W.; Willard, S. T.; Ryan, P. L.
Publisher
Medwell Online, Faisalabad, Pakistan
Citation
Journal of Animal and Veterinary Advances, 2011, 10, 7, pp 900-908
Abstract

This study was undertaken to compare the efficiency of norgestomet ear implant and controlled intravaginal drug release (CIDR) device on the oestrus response and fertility rate in crossbred postpartum anoestrus Jersey cows. 40 cows were divided into 2 treatment groups: group I (n=10) - cows were...

Author(s)
Murugavel, K.; Antoine, D.; Raju, M. S.
Publisher
Indian Veterinary Association, Chennai, India
Citation
Indian Veterinary Journal, 2010, 87, 8, pp 763-765
Abstract

Pure Holstein calves and Montbeliarde-sired crossbred calves from multiparous Holstein dams were compared for gestation length, calf weight at birth, calving difficulty, and stillbirth in 2 research herds of the University of Minnesota. The Montbeliarde-sired calves from multiparous Holstein dams...

Author(s)
Heins, B. J.; Hansen, L. B.; Hazel, A. R.; Seykora, A. J.; Johnson, D. G.; Linn, J. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 5, pp 2293-2299
Abstract

Objectives were to compare the effect of presynchronization and resynchronization methods on fertility responses of grazing dairy cows at first and second artificial insemination (AI) and pregnancy rate during the entire breeding season. Lactating dairy cows (n=1,263) in 2 seasonal grazing farms...

Author(s)
Ribeiro, E. S.; Cerri, R. L. A.; Bisinotto, R. S.; Lima, F. S.; Silvestre, F. T.; Greco, L. F.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2011, 94, 10, pp 4984-4996

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