[Association between magnesium, calcium, phosphorous, copper and zinc in plasma and erythrocytes of umbilical cord blood and biometric parameters of newborns].

The correlation between magnesium, calcium, phosphorous, copper, and zinc in umbilical cord plasma and erythrocytes and gestational age, birth height, weight and head circumference were calculated in 52 newborn infants (27 girls, and 25 boys). No infant had a congenital malformation, all pregnancies were uncomplicated, mothers were healthy and had no history of serious diseases. There were no significant sex-related differences at birth among the variables studied. Gestational age was positively correlated with erythrocyte zinc. Birthweight positively correlated with erythrocyte magnesium and zinc. Height of neonate positively correlated with calcium in plasma. Plasma calcium was positively correlated with erythrocyte copper. The most significant regressors accounting for birthweight were erythrocyte zinc followed by plasma zinc. Reference values in umbilical cord plasma and erythrocytes for magnesium, calcium, phosphorous, copper and zinc was also determined.