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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

Farm trials were conducted on Friesian cows to determine the NR rate to insemination at oestrus or on a fixed-time basis following synchronisation of oestrus with a 12-day progesterone treatment. Silastic coils of 5.0 or 7.0 cm diameter and impregnated with progesterone were inserted into the...

Author(s)
Roche, J. F.; O'Farrell, K.; Prendiville, D.; Davis, W.; Condon, T.
Citation
VIIIth International Congress on Animal Reproduction and Artificial Insemination, Krakow, July 12-16, 1976. Proceedings. Volume I. Communication Abstracts., 1976, pp 215
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

Cows and heifers were given a 12-day treatment with an intravaginal coil containing progesterone, with an injection of 5 mg oestradiol benzoate plus 200 mg progesterone when the coil was inserted. The retention rate of coils with a diameter of 5.5 cm was 91% v 84 for 7.0-cm coils (P<0.05). Calving rate was similar in treated cows inseminated (a) at a detected oestrus (53%), (b) 56 + 74 h after coil removal (53%), (c) 56 h after coil removal with injection of 100 mu g GnRH 20 h before insemination...

Author(s)
Roche, J. F.; Prendiville, D. J.; Davis, W. D.
Citation
Veterinary Record, 1977, 101, 21, pp 417-419
Abstract

Mature Hereford crossbred heifers were treated as follows: (a) progesterone implants for 21 days followed by AI at oestrus (12 females ); (b) progesterone implants for 21 days followed by injection of 400 mu g oestradiol benzoate 20 h after implant removal and insemination at 18 and at 24 h after...

Author(s)
Roche, J. F.
Citation
Journal of Reproduction and Fertility, 1974, 41, 1, pp 223-225
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

Friesian cows were treated with a progesterone-impregnated silastic vaginal coil for 12 days, plus injection of 5 mg oestradiol benzoate and 50 mg progesterone on the day of coil insertion. They were inseminated as follows: (1) at the induced oestrus (522 of 637 cows treated), (2) 56 and 74 h after ...

Author(s)
Roche, J. F.; O'Farrell, K.; Prenderville, D.; Davis, W.; Condon, T.
Publisher
Dublin., Irish Republic
Citation
Irish Republic, Agricultural Institute, Dublin: Animal production. Report from Dunsinea, Moorepark and Western Research Centres. Research report 1975., 1976, pp 40-42
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

The reasons for a reduced oestrous response in heifers following a 9-day treatment with implants of progesterone were determined. Progesterone implants were inserted into Hereford cross heifers for 9 days at different stages of the oestrous cycle. Oestradiol benzoate (5 mg) was also given at the...

Author(s)
Roche, J. F.
Citation
Journal of Reproduction and Fertility, 1974, 40, No.2, pp 433-440

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