This study was designed to assess the effect of hormonal estrous synchronization with Progesterone intravaginal sponges in reproductive efficiency in Hamary ewes. Time taken to display estrous, number of services per conception, conception rate (CR), gestation period (GP), lambing rate and twining rate were assessed. Thirty (30) apparently healthy multiparous Hamary ewes were employed. Their age between (3 - 4 years),beside Nine sexually mature fertile apparently healthy 2 -3 years old Hamary rams were used for natural services. The ewes were allocated randomly into 3 equal groups (10 each)....