Level and composition of fetal hemoglobin expression in normal newborn babies are not dependent on β cluster DNA haplotype

Abstract
Interindividual variations in the level and composition of fetal hemoglobin observed in 604 cord blood samples from normal white and nonwhite newborns, unlike those in adults, are not dependent on β gene cluster DNA haplotype. The data suggest that the mechanism(s) involved in the neonatal expression of Hb F is distinct from that at the adult stage.