[Magnesium concentration in erythrocytes and plasma in childhood (author's transl)].

In 243 children of various ages the magnesium concentration was determined simultaneously in erythrocytes and plasma. The analysis began in the mother immediately after delivery, in the umbilical vein and in the newborn infant, and ended at school age (6-14 years). The magnesium concentration in plasma as well as in the erythrocytes showed a constant tendency to increase. Statistically significant differences occurred between the age group 1-7 days on the one hand and 2-6 weeks on the other, and also between school children and adult controls (n=20). The adult controls also differed statistically from mothers following delivery.