Italian Journal of Animal Science (Feb 2010)

Effect of OPU interval and bST treatment on embryo production in buffalo

  • P.S. Baruselli,
  • F.V. Meirelles,
  • M.F. Accorsi,
  • D.C. Joaquim,
  • Y.F. Watanabe,
  • M.F. Sá Filho,
  • L.U. Gimenes,
  • M.L. Ferraz

DOI
https://doi.org/10.4081/ijas.2007.s2.766
Journal volume & issue
Vol. 6, no. 2s
pp. 766 – 768

Abstract

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The objective of present study was to evaluate the effect of OPU interval and the effect of bST treatment on embryo production in buffalo. Sixteen females were assigned in 4 groups, in a 2x2 experimental design, with main effects of bST (0 or 500mg) and interval of OPU session (every 7 or 14 days), as follows: G-CONT7: OPU once a week; G-CONT14: OPU each 14 days; G-bST7: OPU once a week + 500mg of bST and G-bST14: OPU each 14 days + 500mg of bST. Animals of G-CONT7 and G-bST7 were submitted to 8 OPU sessions, and those of G-CONT14 and G-bST14 to 4 OPU sessions. Overall, OPU once a week (without bST) reduced the number of aspirated follicles, and the total and viable oocytes. Despite of this, OPU every 14 days + bST increased the number of degenerated oocytes, and reduced the number of blastocysts produced on days 6 and 7.

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