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Abstract

The objective was to examine (a) how pregnancy rate on one farm (500 cows) was affected by signs of oestrus and disease stressors and (b) whether pregnancy rate could be maximised by considering cow activity. The signs of oestrus and timings were recorded at artificial insemination (AI), and cow...

Author(s)
Bijker, I.; Christley, R. M.; Smith, R. F.; Dobson, H.
Publisher
BMJ Publishing Group, London, UK
Citation
Veterinary Record, 2015, 176, 16, pp 411
Abstract

The aim of this study was to trial the viability of the vaginal deposition method in UK sheep at pasture during the mating period. 20 Cheviot mule ewes were inseminated once at natural oestrus using frozen-thawed semen from a Texel ram. Oestrus was detected using a vasectomised ram with keel paint. ...

Author(s)
Crilly, J. P.; Sargison, N. D.; Söderquist, L.; Holmström, A.
Publisher
BMJ Publishing Group, London, UK
Citation
Veterinary Record, 2016, 178, 21, pp 532
Abstract

Good heat detection is essential for good reproductive performance in the modern dairy herd using artificial insemination. Veterinary surgeons and farmers use a variety of tools to monitor heat detection including the analysis of inter-service intervals (ISIs). The aim of this study was to explore...

Author(s)
Remnant, J. G.; Huxley, J. N.; Hudson, C. D.
Publisher
British Cattle Veterinary Association, Quedgeley, UK
Citation
Cattle Practice, 2015, 23, 1, pp 27-32
Abstract

The fertility of 646 ewes and gimmers bred by laparoscopic artificial insemination (LAI) in the autumn of 2006 was investigated using a questionnaire and individual ewe breeding records kept for 13 commercial sheep flocks that used LAI routinely. Overall, the pregnancy rate was 66 per cent, but it...

Author(s)
McCappin, N.; Murray, R. D.
Publisher
BMJ Publishing Group, London, UK
Citation
Veterinary Record, 2011, 168, 4, pp 99
Abstract

The first successful artificial insemination (AI) in a rhinoceros was reported in 2007 using fresh semen. Following that success, we decided to evaluate the possibility of using frozen-thawed semen for artificial insemination. Semen, collected from a 35-36 year old Southern white rhinoceros (...

Author(s)
Hermes, R.; Göritz, F.; Saragusty, J.; Sós, E.; Molnar, V.; Reid, C. E.; Schwarzenberger, F.; Hildebrandt, T. B.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2009, 71, 3, pp 393-399
Abstract

A sound understanding of 21-day Insemination Risk and 21-day Pregnancy (Preg) Risks by calendar date allows accurate monitoring of recent dairy herd fertility in all-year-round calving herds. Where average 21-d Preg Risk is inadequate, the primary intervention should be to increase 21-d IR to...

Author(s)
Russell, S.
Publisher
British Cattle Veterinary Association, Quedgeley, UK
Citation
Cattle Practice, 2014, 22, 2, pp 258-264
Abstract

To investigate whether there was a subpopulation of repeat breeders (cows or heifers that returned to oestrus after three inseminations) that were less fertile after a fourth artificial insemination (AI) with or without additional embryo transfer, and to estimate the efficacy of AI plus embryo...

Author(s)
Canu, S.; Boland, M.; Lloyd, G. M.; Newman, M.; Christie, M. F.; May, P. J.; Christley, R. M.; Smith, R. F.; Dobson, H.
Publisher
BMJ Publishing Group, London, UK
Citation
Veterinary Record, 2010, 167, 2, pp 44-51
Abstract

Author(s)
Smith, A. K.; Norman, S. T.; Lievaart, J. J.
Publisher
British Cattle Veterinary Association, Quedgeley, UK
Citation
Cattle Practice, 2015, 23, 1, pp 134-135
Abstract

Author(s)
Gordon, P.
Publisher
Veterinary Business Development Ltd, Peterborough, UK
Citation
Veterinary Times, 2014, 44, 13, pp 6
Abstract

Reproductive technologies including AI have been increasingly adopted worldwide by the dairy industry. Inadequate oestrus detection and labour required for oestrus detection are major reasons why AI is used infrequently in beef production (Kyle and others 1998). Oestrus synchronisation protocols...

Author(s)
Statham, J. M. E.
Publisher
British Cattle Veterinary Association, Quedgeley, UK
Citation
Cattle Practice, 2015, 23, 1, pp 74-97

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