Plasma Aldosterone and 11-Deoxycortisol in Term Neonates: A Reevaluation

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Abstract
We reported previously reference values for seven corticosteroids in the plasma of term neonates and their mothers, including values for aldosterone (Aldo) that appeared high compared to the values in the literature. Plasma 11-deoxycortisol (S) was not measured in that longitudinal study. Using an improved technique of chromatographic separation of Aldo and S, the Aldo levels were measured again, and S levels were newly determined in stored plasma samples of the 12 newborn infants of our original report. The mean concentrations were: (Formula: see text). These plasma Aldo values should replace those of our original report. Thus, both plasma Aldo and S levels decline in the first week of life in normal infants.

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