Data on 292 goats of the white upgraded breed, kept in Poland were studied. The udder measurements were taken 1-2 hours before milking in 60th, 150th and 240th day of the first lactation. The following measurements were taken: udder volume, basis length, width, depth, vertical semi-circumference, horizontal circumference, distance to floor, teat length, teat diameter, distance between teats. The simple correlation coefficients between the udder characteristics and a daily milk yield were calculated. The study showed that during the first lactation the udder and teat dimensions decreased, while the distance between the udder and the floor increased. Strong simple correlation coefficients between the udder characteristics were found; the highest correlations were calculated between the udder volume and horizontal circumference, vertical semi-circumference, width, depth as well as between the horizontal circumference and width and vertical semi-circumference. The udder volume and morphological traits affected the volume (width, horizontal circumference, vertical semi-circumference) were found to be strongly correlated with the daily milk yield.

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