Superestimulação ovariana em vacas da raça gir leiteiro com uso de diferentes concentrações de fsh

R. A. PRADO, F.H. TONIOLLO, G.A. OLIVEIRA, J.

The cows assigned to this study were randomly allocated in three groups, where A (n=19), B (n=19) and C (n=19). Superovulation was induced in the cows from group A with 300UI of FSH, whereas group B received 400UI of FSH, and group C 500UI of FSH. To analyze statistically the potential of reply to the superovulation protocols, the ratios of viable embryos between the treatments had been compared by the Qui-square test ( ), adopting the levels of significance of 5%and 1%. When the level of significance was set as 1%, differences in the ratios of viable embryos were seen in the treatments 300 and 400 UI. With the level of significance of 5% significant differences existed between the treatments of 300 (33/95) and 500 (33/56) UI, whereas no differences existed in the treatment with 400 (65/106) and 500 (33/56)UI. The treatment using 400 UI of FSH presented greater number of viable embryos. KEY-WORDS: Gir. Superovulation. Embryo.