.These breeds are characterized by their high rusticity and capacity for adaptation to different environments [2]. Rembi sheep produces good quality meat and respond well to genetic improvement through selection. Some researchers [3-6] reported varying extents of fertility, fecundity and prolificacy rates, using different doses of PMSG administered via injection to ewes in the breeding season. There was no study about different doses of PMSG in Rembi ewes during the seasonal anoestrus period. Therefore, the present work was aimed to investigate the effects of different doses of PMSG on reproductive performance in Rembi ewes synchronized with progesterone during the seasonal anoestrus.