<prompt> Haemoglobin F is raised in:Juvenile chronic myeloid leukemiaHereditary spherocytosisCongenital red cell aplasiaMysthania gravis  <response>: Answer is A Juvenile CML Fetal Haemoglobin levels HbF are increased in most cases of Juvenile CML - Causes of Raised HbF levels Interpretation of Diagnostic Test 8th411, 412 Haemoglobinopathies - b thalassemia major - b thalassemia minor - Sickle cell disease Hereditary Persistance of HbF Anemia: - Non Hereditary refractory normoblastic anemia - Pernicious anemia - Aplastic anemia Leukemia specially Juvenile Myeloid Leukemia Multiple myeloma Molar pregnancy Patients with Trisomy 13 or Trisomy 21 Downs syndrome Some chronic viral infections eg CMV, EBV 