Abstract
Extract
Sir, — The use of corticosteroids to induce early parturition to obtain a concentrated calving period has been widely accepted in New Zealand. Retention of the placenta following treatment with corticosteroids has been described by Adams (Citation1969), Lauderdale (Citation1972) and Jochle et al. (Citation1972). Welch et al. (Citation1973), using dexamethasone trimethylacetateFootnote* in the Huntly and Bay of Plenty areas, reported that calf mortality was disturbingly high — 31.3% and 17.1% for the respective areas. Despite having no apparent effect on milk production or subsequent fertility it is possible pre-existing infections may be exacerbated by the use of corticosteroids.
Notes
*Opticortenol: Ciba-Geigy.