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Abstract

The effect of supplementary progesterone in conjunction with pig FSH on the induction of superovulation was studied in heifers synchronized with PGF at the mid-cycle stage or a progesterone-releasing intravaginal device (PRID) inserted at different phases of the cycle. The effects of site of ...

Author(s)
Goulding, D.; Williams, D. H.; Roche, J. F.; Boland, M. P.
Citation
Journal of Reproduction and Fertility, 1994, 100, 2, pp 505-510
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

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

Heifers were given 2 injections of 500 mu g cloprostenol (Estrumate, ICI), 11 days apart, and their reproductive tracts were recovered at slaughter. The percentage of heifers that had ovulated 72, 78, 92 and 96 h after the 2nd injection was 0, 31, 61 and 95 resp. Injection of synthetic LHRH 48 h...

Author(s)
Roche, J. F.
Citation
Veterinary Record, 1977, 100, 22, pp 468-470
Abstract

The pregnancy rate in 321 Friesian dairy replacement heifers following two inseminations at fixed times was no different when oestrus was synchronized with either a 12-day progesterone treatment using silastic coils or a double injection regimen of a synthetic analogue of prostaglandin F2 alpha...

Author(s)
Roche, J. F.
Citation
Veterinary Record, 1976, 99, 10, pp 184-186