title: Use of the minor hemoglobin ratio for the determination of gestational age.
abstract: Maternal and cord blood hemoglobin A1c were quantitated at the time of delivery by radioimmunoassay. Other cord blood hemoglobins were quantitated by column chromatography using Bio-Rex 70. The minor hemoglobin ratio : formula: (see text),showed an excellent linear correlation (r2  = 0.88) with gestational age. Therefore, the ratio of : formula: (see text), could be a useful test to determine gestational age in the third trimester.
mesh_terms: D002845:Chromatography; D005260:Female; D005312:Fetal Blood; D005319:Fetal Hemoglobin / Q000032:analysis*; D005333:Fetus / Q000502:physiology; D005865:Gestational Age; D006441:Hemoglobin A / Q000032:analysis*; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011863:Radioimmunoassay
chemical_list: D006441:Hemoglobin A; D005319:Fetal Hemoglobin