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Abstract

Author(s)
Parr, M.; Diskin, M.; Randi, F.; Lively, F.; Barrett, D.; Kenny, D.
Publisher
Irish Grassland Association, Co. Meath, Irish Republic
Citation
Irish Grassland Association Journal, 2016, 50, pp 132-145
Abstract

The failure of cows to successfully establish pregnancy after insemination is an important limiting factor for the efficiency of dairy production systems. The physiological reasons for this are many and pertain to the post partum and early pregnancy periods. Cows that suffer severe negative energy...

Author(s)
Evans, A. C. O.; Walsh, S. W.
Publisher
CSIRO Publishing, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2012, 24, 1, pp 233-237
AbstractFull Text

Experiences from Ireland have indicated many potential uses for insemination data in cattle breeding including; 1. Genetic evaluations for traits of economic importance, e.g., gestation length. 2. Better breeding and management advice for farmers, including sire advice facilities and fertility...

Author(s)
Cromie, A.; Kearney, F.; Evans, R.; Berry, D.; Wilhelmus, D.
Publisher
International Committee for Animal Recording (ICAR), Roma, Italy
Citation
ICAR Technical Series, 2009, No.13, pp 23-30
Abstract

For heifers, beef and moderate-yielding dairy cows, fertilisation generally exceeds 90%. In high-producing dairy cows, it may be lower and possibly more variable. The major component of embryo loss occurs before Day 16 following breeding, with emerging evidence of greater losses before Day 8 in...

Author(s)
Diskin, M. G.; Parr, M. H.; Morris, D. G.
Publisher
CSIRO Publishing, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2012, 24, 1, pp 244-251
Abstract

Background: Studies in mice and humans have shown that imprinted genes, whereby expression from one of the two parentally inherited alleles is attenuated or completely silenced, have a major effect on mammalian growth, metabolism and physiology. More recently, investigations in livestock species...

Author(s)
Magee, D. A.; Sikora, K. M.; Berkowicz, E. W.; Berry, D. P.; Howard, D. J.; Mullen, M. P.; Evans, R. D.; Spillane, C.; MacHugh, D. E.
Publisher
BioMed Central Ltd, London, UK
Citation
BMC Genetics, 2010, 11, 93, pp (13 October 2010)
Abstract

Bipolar electrodes were implanted in one or both uterine horns of 5 pregnant Beagles between days 43 and 48 after mating. Episodes of myometrial electrical activity lasting up to 10 min were detected. 18.4% of the activity was in short episodes (<3 min). The percentage of short episodes...

Author(s)
Weyden, G. C. van der; Taverne, M. A. M.; Dieleman, S. J.
Publisher
University College Dublin, Dublin, Irish Republic
Citation
11th International Congress on Animal Reproduction and Artificial Insemination, University College Dublin, Ireland, June 26-30 1988. Volume 3. Brief communications., 1988, Paper No. 216, pp 3pp.
Abstract

In an attempt to produce a better understanding of the processes involved in the maternal recognition of pregnancy, and thereby a reduction in the high incidence of early conceptus loss in mares, the authors discuss the events leading to luteolysis, with particular emphasis on the synthesis and...

Author(s)
Sharp, D. C.; McDowell, K. J.; Weithenauer, J.
Publisher
University College Dublin, Dublin, Irish Republic
Citation
11th International Congress on Animal Reproduction and Artificial Insemination, University College, Dublin, Ireland, June 26-30 1988. Volume 5. Invited Papers., 1988, pp 347-353
Abstract

Using a radioimmunoassay, the concentration of chorionic somatomammotropin (placental lactogen) in the blood plasma of cattle foetuses ranged from 20-30 ng/ml at 8-10 wk of pregnancy to 5 ng/ml just before birth. In the dam, the plasma concentration was highest (2 ng/ml) at parturition.

Author(s)
Beckers, J. F.; Wouters-Ballman, P.; Ectors, F.
Publisher
University College Dublin, Dublin, Irish Republic
Citation
11th International Congress on Animal Reproduction and Artificial Insemination, University College Dublin, Ireland, June 26-30 1988. Volume 2. Brief communications., 1988, Paper No. 83, pp 3pp.
Abstract

In 3 studies involving sampling of milk from cows at different stages of pregnancy, it was shown that the incidence of mastitis is unlikely to influence the accuracy of pregnancy diagnosis based on oestrone sulphate concentration in the milk, unless the samples are collected at 100-120 days of...

Author(s)
McCaughey, W. J.; Mackie, D. P.
Publisher
University College Dublin, Dublin, Irish Republic
Citation
11th International Congress on Animal Reproduction and Artificial Insemination, University College Dublin, Ireland, June 26-30, 1988. Volume 4. Brief Communications., 1988, Paper No. 581, pp 3pp.
Abstract

In the 1st of 2 trials, milk was sampled >120 days after the last mating, and the oestrone sulphate concentration was determined. It was >100, 40-92 and 0-40 pg/ml in samples from 6, 28 and 45 cows, and this was interpreted as 6 pregnant, 28 inconclusive and 45 non-pregnant; calving results...

Author(s)
McCaughey, W. J.
Publisher
University College Dublin, Dublin, Irish Republic
Citation
11th International Congress on Animal Reproduction and Artificial Insemination, University College Dublin, Ireland, June 26-30, 1988. Volume 4. Brief Communications., 1988, Paper No. 580, pp 3pp.

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