[Assessment of normal values of peripheral blood in children up to 7 years of age].

After examination of 722 healthy children, permanent residents in the Rzeszów region, the mean values of peripheral blood were established for age groups from 1 to 84 months. The values of individual morphological++ parametres of blood were independent in this region of the environment (rural or urban areas), sequence of birth in sibship, and sex. Physiological erythropenia was found to appear already from the 2nd month of life on, and in differential white blood cell count ++lymphocytes prevailed up to the age of 66 months (second crossing). A high correlation was demonstrated between haematocrit and haemoglobin and erythrocyte count.