“…However, it must be remembered, that there will be a major problem with animal to animal variation. Studies with identical twin heifers, receiving the same superovulatory treatment, have shown wide variation, equivalent to what could be expected from twin litter mates, (Wiemer et al, 1988). Data from our laboratory clearly show a beneficial effect of Folltropin, when compared with PMSG in feedlot heifers ( Table 3).…”