National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present research was conducted to compare the efficacy of Co-Synch plus CIDR versus Double PG plus GnRH protocol in repeat breeder (RB) cows. A total of 1476 RB cows were selected after thorough gynaeco-clinical examination and were dewormed (Inj.Dectomax®@ 1ml/50kg bodyweight S/C) followed by mineral mixture (Powder Lacton® 50g/day orally) supplementation for 30 days. Then these RB cows were either assigned to Co-Synch plus CIDR protocol ( n= 614; wherein on day ‘0’:inj. GnRH (Busereline acetate10 µg I/M) and Controlled Internal Drug Release (CIDR) implant was inserted into the vagina and kept in situ for 7 days, on day ‘7’: CIDR removed and inj. PGF2α, (Dinoprost Tromethamine 25 mg I/M) was given, day ‘9’: inj. GnRH (Busereline acetate10 µg I/M) and insemination (AI) was done. Further, on the day ‘10’ if any signs of oestrus then, a second AI was done) or Double PG plus GnRH protocol (n=862; wherein on day‘0’: inj. PGF2α (Dinoprost Tromethamine 25mg I/M), oestrus detection from 2nd to 5th day and insemination was done along with inj. GnRH (Busereline acetate 10 µg I/M), again PGF2α, (Dinoprost Tromethamine 25 mg I/M) was administered on 11th day to non-responders and oestrus detection from 13th to 16th day and insemination was done along with inj.GnRH (Busereline acetate 10 mg I/M). Pregnancy diagnosis was performed on 60th-day post-AI by per-rectal examination. The conception rates were found to be 50.97, 36.04 and 11.11 per cent for RB cows of Co-Synch plus CIDR protocol and 49.65, 29.87 and 10.75 per cent for RB cows of Double PG plus GnRH protocol in first, second and third oestrus cycles respectively, achieving overall conception rate of 63.68 and 56.15 per cent in RB cows of Co-Synch plus CIDR protocol and Double PG plus GnRH protocol, respectively. It is concluded from the present study that, Co-Synch plus CIDR protocol is better than the Double PG plus GnRH protocol for the treatment of repeat breeder cows.
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