Abstract
The aim of this study was to compare the efficacy of exogenous progesterone, either without or with a single injection of gonadotrophin releasing hormone (GnRH), at initiating early post-calving ovulatory and oestrous activity. Six days (d)after the first post-partum follicle had attained dominance cows were allocated to either an untreated control group; treated with a progesterone-impregnated CIDR
Proceedings of the New Zealand Society of Animal Production, Volume 55, , 261-264, 1995
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