Abstract
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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