Influence of parity and body condition score on response and conception rate of saanen cross by Estrus Synchronization with CIDR

Fourteen Saanen cross with parity and BCS record were allocated in two groups where the first stage involved 6 does and 8 does in following stages. All does were subjected to 14-days CIDR treatment containing 0.3 g progesterone followed by subcutaneous injection of 5ml catosal and 5ml ferriade. After 23 h of CIDR withdrawal, buck was introduced from 9 am to 6 pm for 3 days duration to allow natural mating and the response observed visually. The result showed estrus response were not differ (p>0.05) between nulliparous (40%), primiparous (66.67%) and multiparous (40%) and only does within BCS 2.5-4.0 were response (77.78%). Additionally, interval from CIDR withdrawal to onset of estrus were not differ (p>0.05) between nulliparous (24.78±15.84h), primiparous (19.86±9.99h) and multiparous (24.85±13.13h) does and not differ (p>0.05) between BCS, where only does within BCS 2.5-4.0 were response with 36.95±9.47h interval and 8.12 ± 3.96h estrus duration. Estrus duration were not differ (p>0.05) between nulliparous (1.57±1.28h), primiparous (8.61±8.04h) and multiparous (6.57±5.18h) does. Parity and BCS influence expression of certain estrus sign (p<0.05). The most reliable sign were swollen/red vulva, restlessness and doe rub face/body to fixed object/ buck. There were no significant different between parity and BCS with conception rate (p>0.05) where nulliparous (60%), primiparous (33.33%) and multiparous (50%) and BCS<2.5 (33.33%) and BCS=2.5-4.0 (66.67%). As conclusion, CIDR program 100% successful in synchronizing estrus in does. Parity and BCS of does not influence estrus response, onset of estrus, estrus duration and conception rate but influenced on certain estrus sign.