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Animal Science Database

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Abstract

Current bovine pregnancy detection methods are not reliable until at least day 28 post artificial insemination (AI). The bovine estrous cycle is approximately 21 days; consequently, producers miss an opportunity to rebreed at the next estrous event. Therefore, commercial interest exists for the...

Author(s)
Johnston, D.; Estepa, I. M.; Ebhardt, H. A.; Crowe, M. A.; Diskin, M. G.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 114, pp 301-307
Abstract

Background: The aim of the study is to evaluate the effectiveness of thermographic monitoring, using the temperature changes of perianal and perivulvar areas for the determination of estrus in Anatolian Shepherd bitches. Fifteen bitches were used in the study. Blood and vaginal smear samples were...

Author(s)
Olğaç, K. T.; Akçay, E.; Çİl, B.; Uçar, B. M.; Dașkın, A.
Publisher
BioMed Central Ltd, London, UK
Citation
Journal of Animal Science and Technology, 2017, 59, 21, pp (9 October 2017)
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
AbstractFull Text

The physical and behavioural signs of oestrus, the environmental factors affecting oestrus and the different methods of oestrus detection in cattle are described.

Author(s)
Sanjay Agarwal; Ahmed, F. A.; Sharad Kumar; Sudarshan Kumar
Publisher
North-East Veterinarian, Guwahati, India
Citation
North-East Veterinarian, 2008, 8, 2, pp 8-11
Abstract

Objective: To compare the sensitivity and positive predictive value of four methods for detection of oestrus in dairy cows with resynchronized oestrous cycles. Procedure: Oestrous cycles in cows in three herds were synchronized for a first round of artificial insemination (AI) and then...

Author(s)
Cavalieri, J.; Eagles, V. E.; Ryan, M.; MacMillan, K. L.
Publisher
Australian Veterinary Association, Artarmon, Australia
Citation
Australian Veterinary Journal, 2003, 81, 7, pp 422-425
Abstract

Experience at artificial insemination centres has shown that temporary infertility is not uncommon in bulls, but that methods whereby this can be overcome have yet to be determined. Fluctuations in the degree of fertility of the bull are of great importance, especially when the bull is mated to...

Author(s)
DALLING, T.; FOLLET, S. J.; SCORGIE, N. J.; CLARKE, C. H.; REES-MOGG, G.; BLEDISLOE.; VISCOUNT.; GOULD, G. N.; GARDNER, C. H.; LEA, H.; THOMSON, L.; STEVENS, H.; SMITH, G. R. W.; GARNER, F. H.; THOMPSON, F. N.; PORTER, J.
Publisher
Lond.,
Citation
Journal of the Farmers' Club, 1945, Part 6, pp 74-88 pp.

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