Normal Fetal Hemoglobin Levels in the Sudden Infant Death Syndrome

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Abstract
It has been reported that infants who die of the sudden infant death syndrome (SIDS) have elevated fetal hemoglobin levels. To test this hypothesis, we determined the level of fetal hemoglobin in dead and living infants in three different laboratories by three methods: high-performance liquid chromatography, polyacrylamide-gel electrophoresis, and cell-based immunofluorescence assays for fetal hemoglobin-containing red cells (F cells). Our infant study population consisted of 67 infants who had died of SIDS, 22 control infants examined at autopsy, and 80 living infants. The fetal hemoglobin level was not higher in the infants who had died of SIDS than in the control infants for any age group analyzed.