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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

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