Clinical evaluation of CIDR implant in post-partum anestrus buffaloes under field condition

Anestrus buffaloes (n=100) from different breeds having a post-partum interval of 90 or more days were selected for field study on the basis of ovarian inactivity, optimal body condition score and apparently trim general health. Selected buffaloes were grouped, Group I and II (n=40 each) buffaloes were treated with CIDR intravaginal application for 7 and 9 days respectively followed by same treatment of Inj. PGF2 alpha 500 mcg on removal of CIDR and subsequently Inj. GnRH 10 mcg intramuscularly on day of AI. Group III (n=10) buffaloes were kept as untreated control. Fixed time Artificial Insemination was performed in all treated buffaloes after 24 h after Inj. PGF2 alpha. Animals which failed to conceive were reinseminated in the next estrus. All the buffaloes (100%) from both the Treatment groups responded to the treatment as against 20% response in Control group buffaloes. Average duration of estrus in buffaloes was recorded from Group I, II and III as 18.76±1.11, 22.19±1.23 and 17.11±1.1 h, respectively. Prominent estrus symptoms were recorded in both the Treatment groups, whereas buffaloes from untreated Control group exhibited weak oestrual exhibition response. The overall pregnancy in Group I, II and III was 50, 70 and nil percent respectively. It can be concluded that CIDR implant for 9 days (long term) followed by Inj. PGF2 alpha at the time of CIDR removal and Inj. GnRH on the day of timed artificial insemination is very effective under field conditions.