Conclusions: A system of regression equations was
developed that allows determination of LCS for arbitrary
milk yield, according to the method of Wood. From the
known daily yield of the first records the LCS can be
adjusted closest to these values to predict standard
lactation curve shape. Greater differences in the shape of
the lactation curves were found only between the first
calving heifers and cows. Therefore, the use of different
regression equations for the first calving heifers and
cowsis recommended, without taking into consideration
the impact of breed