Cadmium, copper and zinc concentrations in the blood and hair of 51 women after delivery of children with locomotor system malformations (Group I) and, as a control, 46 women who gave birth to healthy children (Group II) were different but none of the values were statistically significant. However, lead con-centrations in the blood and the hair of women from the Group I (median: 109.63 ěg/L and 1.31 ěg/g) were notably higher than in Group II (median: 66.45 ěg/L and 0.58 ěg/g, respectively). Maternal lead concentra-tions in the blood of 17 women from Group I decreased to 60.73 ěg/L, and in their hair to 1.20 ěg/g after 12 months. We observed a significant correlation between lead concentrations and copper levels in the hair of the mothers.