Abstract

An agonist of gonadotrophin releasing hormone (GnRH) improves dairy cow pregnancy rates when injected at an appropriate stage after insemination. These studies were extended to ewes and hoggets in a series of trials to determine the effects of a single injection of GnRH made at varied intervals after mating. All sheep were mated at a synchronised oestrus (day of oestrus = day 0) with treated ewes being injected on a set date with 2 or 4

DC, Smeaton, DG McCall, JB Clayton, and BW Dow

Proceedings of the New Zealand Society of Animal Production, Volume 46, , 149-152, 1986