Serum chromium levels of hypoglycemic preterm and full-term babies were investigated. Normoglycemic preterm and full-term babies were selected as the control group. There was no statistically significant difference in serum Cr levels between preterm and full-term, hypoglycemic and normoglycemic, preterm hypoglycemic and preterm normoglycemic, full-term hypoglycemic and full-term normoglycemic babies. Serum Cr levels of intrauterine-growth-retarded babies were relatively low compared to infants appropriate for gestational age. Serum Cr levels of babies with mothers younger than 35 years of age had significantly lower levels than older mothers' babies.