[Supplementation with fully adapted milk substitute or calorie-free tea in the first days of life. Effect on drinking behavior and some measurements in mature healthy newborns].
180 mature newborn infants (birth-weight 3390 +/- 397 g) were randomly divided into 2 groups of 90 each: all were breast-fed according to the guide-lines recommended by "La Leche League". When breast feeds did not suffice the infants in group A were supplemented with sugar-free tea (o kcal), those in group B with a fully adapted formula (518 kcal/dl). Group A infants generally were more hungry, scored a greater suckling activity, higher feeding frequency and less calorie intake. 19% of them received 1-2 additional milk-feeds because of severe hunger reactions. Group B had a somewhat lower intake of breast milk, a statistically significant higher intake of supplementary feeds and a higher calorie intake. 5.5% in either group were not supplemented at all. The groups did not differ in body temperature, greatest weight loss, serum bilirubin and blood glucose levels and red blood cell count. Supplementation of formula revealed no obvious advantage over supplementation of tea in the first 4 days of life. However, feeding frequency was lower in infants receiving milk supplements.