OBJECTIVE In some cases of non-immune hydrops there is congenital or acquired fetal anemia. The aim of this study was to investigate the potential value of fetal middle cerebral artery peak systolic velocity (MCA-PSV) in the assessment and management of non-immune hydrops due to anemia. METHODS Fetal MCA-PSV and fetal hemoglobin concentration, in blood obtained by cordocentesis, were measured...

H EREDITARY PERSISTENCE OF FETAL HEMOGLOBIN is a term tentatively applied to a specific inherited anomaly manifested throughout life by the presence of large amounts of fetal hemoglobin in the erythro-cytes in the absence of anemia or clinical manifestations. The abnormality is attributable to a single autosomal genetic factor. Since the primary effect of the mutant gene is unknown, designation...

The regulation of fetal hemoglobin in adult erythroid cells was investigated with bone marrow cultures. Fetal hemoglobin (Hb F) was identified in individual erythroid colonies with fluorescent antibodies against Hb F and synthesis of gamma chains was determined with analyses of radioactive globins. The appearance of fetal hemoglobin in erythroid colonies was clonal. All the cells of the Hb F sy...

We have previously shown that coculture of human embryonic stem cells (hESCs) for 14 days with immortalized fetal hepatocytes yields CD34(+) cells that can be expanded in serum-free liquid culture into large numbers of megaloblastic nucleated erythroblasts resembling yolk sac-derived cells. We show here that these primitive erythroblasts undergo a switch in hemoglobin (Hb) composition during la...

Maternal fetal leakage (FMH) is a well-known cause of anemia. We define it as the transition erythrocytes into maternal circulation. Its severity determined by measuring level hemoglobin in mother's blood using Kleinhauer-Betke test or cytometric method (FCM). The paper presents case newborn with massive maternal-fetal leakage. Kleinhauer result was greater than 5% cells, and initial neonatal 3...

We have analyzed the synthesis of fetal hemoglobin (HbF) in the differentiated erythroid colonies produced by erythropoietin-responsive committed erythroid progenitors in plasma cultures of human marrow and peripheral blood. Two independent biochemical techniques. carboxymethyl-cellulose column chromatography of 3H-leucine-Iabeled globin. and polyacrylamide gel electrophoresis of 59Fe-labeled h...