<prompt> All can lead to development of ove anemia in patients with long standing compensated hemolytic anemia, EXCEPT:PregnancyRenal failureFolate deficiencyHypothyroidism  <response>: A patient with a hemolytic condition may present without anemia Compensated hemolytic anemia It becomes decompensated in Pregnancy Folate deficiency Renal failure Interfering with adequate EPO production Also in Acute infections- which depresses erythropoiesis. The most dramatic example is parvovirus B19 infection, which may lead to aplastic crisis. Ref: Harrison, E-18, P-873. 