Selected parameters of lipid metabolism were studied in a group of 76 children aged 12-13 years. The children were divided into 4 subgroups according to the duration of neonatal nutrition (no breast feeding, breast feeding for 3, 6 or more than 6 months). We studied the concentration of total serum cholesterol, its distribution into lipoprotein fractions, the concentration of serum triacylglycerols and apolipoproteins Ai (Apo Ai) and B (Apo B). Atherogenic indexes were calculated from the data obtained. The highest cholesterol levels (5.20 ±0.15 mmoU-1) were found in children who had been breast-fed for more than 6 months, while the highest concentrations of Apo B (0.80 ±0.07 g.r1) and Apo Ai (1.76 ±0.06 g.l-1) and the highest Apo B/Apo Ai ratio (0.45 ±0.04) were found in children with the shortest period of breast-feeding. No significant sex-related differences in total, VLDL, LDL, HDL cholesterol, triacylglycerols and apolipoproteins were observed.