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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

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

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

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