The induction of oestrus during the early post partum period was attempted in 172 Merino ewes which lactated during autumn. Treatment was initiated on day 15 post partum and included groups receiving (i) a single 50 μg injection of GnRH,…
The effects of oestrogen priming and GnRH administration on the release of LH and on luteal function were investigated using 66 spring-lambing S.A. Mutton Merino ewes in early lactation. Seven randomly selected groups of ewes received either (i) 30 μg…
Post-partum plasma progesterone concentrations and luteal progesterone content were measured in lactating and non-lactating ewes during a normal breeding season in autumn and an abnormal breeding season in spring. The results indicate that silent ovulations during the autumn breeding season…
