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Abstract

In a field trial involving 469 cows, calving rates were similar for cows inseminated at oestrus detected during a 24-day observation period (49%), cows given 2 injections of cloprostenol 12 days apart and inseminated at a detected oestrus (45%), and cows double-inseminated 72 + 96 h after the 2nd...

Author(s)
Roche, J. F.; Prendiville, D. J.
Publisher
Dublin., Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centres. Research report 1977., 1979, pp 39-40
Abstract

181 cows were inseminated after a 12-day treatment with a PRID (progesterone-releasing intravaginal device); the used coil was re-inserted into 89 of them 16 days after AI, and was left in place for 7 days. For the group given 1 PRID treatment, the number of repeat oestrous periods observed on days ...

Author(s)
Roche, J. F.
Publisher
Dublin., Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centres. Research report 1977., 1979, pp 38-39
Abstract

In a trial involving 1090 Friesians, the cows were inseminated once at oestrus detected during a 24-day observation period or 52, 56 or 60 h after removal of a progesterone-releasing intravaginal device to which was attached a capsule containing 10 mg oestradiol benzoate. Calving rate for the 4...

Author(s)
Roche, J. F.; Prendiville, D. J.; O'Leary, S.
Publisher
Dublin., Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centres. Research report 1977., 1979, pp 37
Abstract

After treatment for 12 days with a PRID (progesterone-releasing intravaginal device) having a capsule containing 10 mg oestradiol benzoate attached, 42 out of 82 Friesian cows calved to AI 56 h after PRID removal, and 36 out of 72 calved to double AI at 56 + 74 h; corresponding results for cows...

Author(s)
Roche, J. F.
Publisher
Dublin., Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centres. Research report 1977., 1979, pp 36-37
Abstract

Trials were carried out on 1184 dairy cows which had calved at least 6 wk before treatment, and on 255 heifers, to determine the effectiveness of cloprostenol to control oestrus. In trial 1, following 2 injections of cloprostenol given 12 days apart, there was no difference in calving rate...

Author(s)
Roche, J. F.; Prendiville, D. J.
Citation
Theriogenology, 1979, 11, 2, pp 153-162
Abstract

Experiments were carried out on 3173 cattle to determine factors influencing the onset of oestrus and fertility following treatment with a progesterone-releasing intravaginal device (PRID). Injection of 5 mg oestradiol benzoate (OB), with or without 200 mg progesterone or 10 mg OB in a gelatin...

Author(s)
Mawhinney, S.; Roche, J. F.
Publisher
Martinus Nijhoff., The Hague, Netherlands
Citation
Control of reproduction in the cow. A seminar in the EEC Programme of Coordination of Research on Beef Production held at Galway, September 27-30, 1977., 1978, pp 511-530
Abstract

A postal survey was carried out to determine the influence of certain factors on calving rate of spring-calving dairy cows in the Irish Republic in 2 consecutive years. Only 44% of farmers responded to the survey in 1973 and 58% in 1974. The calving rate for 8285 inseminations was 66%. There was no ...

Author(s)
Roche, J. F.; Sherington, J.; Mitchell, J. P.; Cunningham, J. F.
Citation
Irish Journal of Agricultural Research, 1978, 17, 2, pp 149-157
Abstract

In 1973-74, a postal survey was carried out on spring-calving dairy cows in the Irish Republic. For 8285 inseminations, the overall CR was 66%. The interval from calving to 1st insemination averaged 69 days. For cows conceiving to 1st insemination, this interval was significantly longer (70 days)...

Author(s)
Sherington, J.; Roche, J. F.; Cunningham, J. F.; Mitchell, J. P.
Citation
Irish Veterinary Journal, 1978, 32, 8, pp 137-142
Abstract

In a field trial, 1169 postpartum cows were given a 12-day oestrus synchronisation treatment with progesterone-impregnated vaginal coils plus an injection of 200 mg progesterone and 5 mg oestradiol benzoate at the time of coil insertion. The females were (1) inseminated at oestrus, (2) inseminated...

Author(s)
Roche, J. F.; Prendiville, D.; Davis, W. D.
Publisher
An Foras Taluntais., Dublin, Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centre. Research report 1976., 1978, pp 34-35
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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