Abstract
The enzymatic activity of pyruvate kinase (PK) and phosphofructokinase (PFK) was determined in maternal erythrocytes at term. The activity of the two enzymes was positively correlated to the weight, but not to the crown to heel length. Only PK was positively correlated to the head circumfererce of the newborn infants. The results agree with the hypothesis of impaired energy metabolism in fetal malnutrition and suggest the use of the maternal erythrocytes as markers for fetal cells.
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