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 study was conducted on oestrus Murrah buffaloes presented for artificial insemination (AI) at Cattle and Buffalo farm, Livestock Production and Management (LPM) section of the institute during August, 2019 to March, 2020. The buffaloes were scanned ultrasonographically to record size of the pre- ovulatory follicle (POF). The buffaloes were simultaneously inseminated by frozen thawed semen twice as per AM- PM schedule. Pregnancy diagnosis was performed thirty days post insemination by per- rectal ultrasonography (USG). Out of total 60 buffaloes, 60% had POF on their left ovary and 40% on right. POF size was significantly smaller (11.37 ± 0.39 mm) in heifers which became pregnant in contrast to non- pregnant (14.31 ± 0.92 mm), however it did not differ significantly in parous buffaloes. It was recorded that larger sized POF had lower pregnancy rate (35.7%) in comparison to smaller (50.00%) and medium (50.00%) sized POF. In conclusion, pregnant heifers had smaller POF size than non pregnant and higher pregnancy rates were associated with smaller and medium sized POF, in comparison to large.
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