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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

Over a 14-month period, 100 Scottish Blackface ewes were given (1) a melatonin implant every 10 days, (2) alternating 30-day periods of melatonin implantation every 10 days and no implantation, or (3) no treatment (controls). The interval from the start of treatment to 1st oestrus averaged 74±70,...

Author(s)
Johnston, J. P. J.; Quirke, J. F.; Boland, M. P.; 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. 408, pp 3pp.