For the udder to remain healthy, milking period should be brief, and the optimal milk flow has to be reached as soon as possible and remain constant as long as possible. Research has shown that the lowest somatic cell count (SCC) for the Holstein cows logarithmic sec (LSCC = 3.03) were observed duration of increasing phase (dIP) = 0.3-0.6 min, and in those of the Simmental breed (LSCC=2.96) at dIP=0.6-0.9 min. Furthermore, the prolongation of the plateau phase (dPP) of the milk flow curve have a beneficial effect on the udder health in both breeds of cows (LSCC=2.46 and 2.50). The dPP should be prolonged by shortening the duration of decreasing phase (dDP), since the lowest somatic cell counts in milk (LSCC=3.27 and 2.80) were observed when the dDP was shorter than 0.7 min.