A study was conducted to test the hypothesis that synchronizing the
follicular wave emergence by hormonal and non hormonal methods and
delaying the exposure of follicles to LH would increase the
ovulation rate and embryo recovery in Bos indicus cattle. A total
of 94.83% cows responded to superovulation treatment without any
significant difference between groups. Compact morula comprised the
highest number (63.22 - 79.41%) in all the treatment groups.
Overall data revealed that 25.45%, 40.00% & 34.54% of cows
flushed were poor, average and good embryo donors respectively. As
the CL number increased, the mean number of total ova/embryos
increased progressively and significantly within the groups
consequent to increase in ovulation number from 2-10 and >10
respectively. The number of calving had no significant (P>0.05)
effect on superovulatory responses. Pregnancy rate with transfer of
fresh embryos (52.94%) was significantly influenced by transfer
site and transfer quality. The ovulation rate and embryo recovery
were negatively correlated to concentrations of P4 on day 0 but
positively correlated to concentrations of P4 on day 3 and day 7/8.
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