The incidence of ovarian cysts varied depending on the week the herd was examined. In
two weeks no cysts were found, while in other weeks, up to eight new cases were found. This
condition compromises the results obtained after slaughter and evaluation in the slaughterhouse
due to the variability in cysts found over time. The variation between weeks could
be explained by the observation of Gherpelli and Tarocco (1996) where the presence of
zearalenone could be related to the incidence of cysts. However, the presence of mycotoxins
was not evaluated in the present trial, although there is excellent quality control of
feed production on both farms. Another that indicates the absence of zearalenone contamination
is the very desirable reproductive performance of the herds in which evaluations
occurred.