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Abstract To investigate the toxic effect of tobacco smoke on the fetus, we measured in cord blood the concentrations of -fetoprotein (AFP), the principal serum protein in early ontogenic development, and erythropoietin (EPO), as an index of chronic fetal hypoxia. A total of 103 consecutively enrolled term newborns of smoking mothers and 103 term infants of nonsmoking parents were studied. The meanSD...