Evaluation of One Shot and Two Shot Prostaglandin Injection on Estrus Response in Bali Cattle

Abstract

The aims of this study was to evaluate the effect of synchronization system with prostaglandins F2α (PGF2α) on bali cows. Sixteen bali cows with good body condition and normal estrus cycles were divided into two group, each group consist eight animal. Groups I which received estrus synchronization using 5 ml PGF2α (one shot prostaglandin) intramuscularly. Group II which received estrus synchronization consisted of two dose regimen injection on day 0 using 5 ml PGF2α (two shot prostaglandin)intramuscularly. On day 11 (11 days after first injection), recieved repeated injection using 5 ml PGF2α. All cows were monitoring the estrus occurrences twice times a day in the morning and afternon by observing estrus symptoms. Out of 8 cow recieved one shot prostaglandin, six (75%) cow exhibited estrus. The on set of estrus was 79.83 hours and the intensity of estrus was 66.67% (4/8) exhibited normal, In two shot prostaglandin found, five cow (62.5%) exhibeted estrus, The on set of estrus was 67.40 houers and the intensity of estrus was 80% exhibited normal.The results showed that there was no significant difference in estrus response, on set of estrus snd estrus intensity in bali cattle cows after injection of one shot prostaglanding and two shot prostaglandin. It is concluded that The study concluded that prostaglandin in one shot and two shot system was effective to synchronize post partum bali cows.