Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
권호 표지

Ovulation Synchronization in Water Buffaloes Guided by Milk Progesterone ELISA

  • Hoque, Md. Nazmul (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Talukder, Anup Kumar (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Kamal, Md. Mostofa (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Jha, Ajit Kumar (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Bari, Farida Yeasmin (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Shamsuddin, Mohammed (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University)
  • Received : 2011.04.15
  • Accepted : 2011.04.25
  • Published : 2011.06.30
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Abstract

Ovulation synchronization (ovsynch) has proved to increase the number of insemination in cattle by overcoming the problems of heat detection. The aim of this study was to do ovsynch in water buffaloes where heat detection is a major reproductive problem and to determine the conception rates after timed artificial insemination (TAI). Twenty cyclic buffaloes at ${\geq}$ 60 days postpartum were selected by examining 24 unobserved estrus buffaloes based on milk progesterone assay (progesterone concentration ${\geq}$ 1.0 ng/ml) from the Mymensingh district of Bangladesh. Ovsynch treatment regimen was started irrespective of the stage of estrous cycle. Gonadorelin (500 ${\mu}g$) was injected intramuscularly at Day 0 followed by Alfaprostol (8 mg) at Day 7. A second injection of Gonadorelin was given at Day 9 and TAI was done with frozen semen from Mediterranean buffalo bulls at 16~20 hours of the second Gonadorelin injection. Milk progesterone ELISA at Day 10~12 post AI confirmed ovulation in 16 out of 20 (80%) buffaloes (progesterone concentration ${\geq}$ 1.0 ng/ml). High progesterone concentration (${\geq}$ 1.0 ng/ml) at Day 10~12 and Day 22~24 of AI showed pregnancy in six out of 20 (30%) buffaloes. Pregnancy was further confirmed by ultrasonography at Day 40 in these six buffaloes. In conclusion, ovsynch followed by TAI could be applied in cyclic buffaloes for overcoming the estrus detection problems; however, more studies are needed to increase the conception rate.

Keywords

References

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