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Hormonal control of fertility in sheep. 7. Effect of FGA dose on the reproductive performance of Altamura sheep synchronized at the traditional spring and autumn breeding seasons



Hormonal control of fertility in sheep. 7. Effect of FGA dose on the reproductive performance of Altamura sheep synchronized at the traditional spring and autumn breeding seasons



Annali della Facolta di Agraria, Universita di Bari80 1983; 31: 269-277



In spring, 180 Altamura ewes at the end of lactation and 150 days post partum were allotted to 2 groups given vaginal sponges for 14 days containing 30 and 40 mg FGA resp., followed by 400 IU PMSG on sponge removal. Mating groups were established 48 h later, with 1 male :10 females. The percentages of ewes lambing to the induced oestrus were 72.7 and 57.6 (P<0.05) resp., and the number of lambs per 100 ewes lambing 166.2 and 188.7.

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