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Abstract

Pregnancy per insemination is a major determinant of reproductive efficiency in cattle and is affected by concentrations of progesterone (P4) during early pregnancy. The relationship between pregnancy per artificial insemination (P/AI) and early luteal concentrations of P4, and repeatability of...

Author(s)
Parr, M. H.; Mullen, M. P.; Crowe, M. A.; Roche, J. F.; Lonergan, P.; Evans, A. C. O.; Diskin, M. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 5, pp 2390-2396
Abstract

In the study presented, the hypothesis that ligands of the insulin-like growth factor (IGF) family, as well as their binding proteins (BPs), are temporally regulated and are altered by elevated progesterone (P4) and/or pregnancy was tested. Heifers detected in standing estrus following...

Author(s)
McCarthy, S. D.; Roche, J. F.; Forde, N.
Publisher
American Physiological Society, Bethesda, USA
Citation
Physiological Genomics, 2012, 44, 2, pp 130-140
Abstract

Progesterone-induced blocking factor (PIBF) and galectins modulate the maternal immune response during pregnancy. We hypothesized that the relative transcript abundance of the above genes would be different during the luteal phase/early pregnancy and would be affected by progesterone...

Author(s)
Okumu, L. A.; Fair, T.; Szekeres-Bartho, J.; O'Doherty, A. M.; Crowe, M. A.; Roche, J. F.; Lonergan, P.; Forde, N.
Publisher
American Physiological Society, Bethesda, USA
Citation
Physiological Genomics, 2011, 43, 14, pp 903-910
Abstract

Higher systemic progesterone in the immediate post-conception period is associated with an increase in embryonic growth rate, interferon-tau production and pregnancy rate in cattle. The objective of this study was to examine the effect of increasing progesterone concentration on Day 3 on subsequent ...

Author(s)
Carter, F.; Forde, N.; Duffy, P.; Wade, M.; Fair, T.; Crowe, M. A.; Evans, A. C. O.; Kenny, D. A.; Roche, J. F.; Lonergan, P.
Publisher
CSIRO Publishing, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2008, 20, 3, pp 368-375
Abstract

81 Hereford × Friesian heifers, aged 3 months, were (1) untreated and served as controls, (2) implanted with 36 mg zeranol, (3) implanted with 300 mg trenbolone acetate, (4) implanted with trenbolone acetate plus 2 pellets, each of 19 mg oestradiol-17β, (5) implanted with 2 pellets of...

Author(s)
Moran, C.; Quirke, J. F.; Prendiville, D.; Roche, J. 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 4. Brief Communications., 1988, Paper No. 570, pp 3pp.
Abstract

Blood samples were taken from 48 heifers three times a day during a week before and 20 days after AI. Blood progesterone and LH remained constant for up to 16 days after insemination, whether the heifer was pregnant or not, but between 17 and 20 days the progesterone decreased in non-pregnant...

Author(s)
Roche, J. F.; Ireland, J. J.; Boland, M. P.; McGeady, T. M.
Citation
Veterinary Record, 1985, 116, 6, pp 153-155
Abstract

The calving rate to AI following administration of progesterone or prostaglandin was significantly influenced by ovarian activity at the start of the treatment. The calving rate of animals with ovaries classified at the start of treatment as inactive was 19% v 78 for those with active ovaries....

Author(s)
Roche, J. F.; Prendiville, D. J.
Citation
Veterinary Record, 1978, 102, 1, pp 12-14

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