[The serum level of ionized calcium, total calcium, and magnesium in neonates (author's transl)].

In the first three days of life ionized and total calcium and magnesium were determined in the serum and compared with perinatal parameters in a heterogenous groups of newborn infants (n equals 33). The findings allow the following conclusions: 1. There is a relative good correlation between ionized and total calcium. 2. There is no statisticly proven correlation between magnesium and ionized or total calcium. 3. There is a close relation between APGAR-score and the levels of calcium in the first hours of life. But apparently there is no relation between the gestational age or the weight of birth and magnesium, between the gestational age or the weight of birth and ionized or total calcium there is no close correlation.