Hemoglobin F levels do not change during the painful crisis of sickle cell anemia.
D000755:Anemia, Sickle Cell / Q000097:blood*; D005260:Female; D005319:Fetal Hemoglobin / Q000378:metabolism*; D006451:Hemoglobin, Sickle / Q000378:metabolism; D006801:Humans; D011247:Pregnancy
D006451:Hemoglobin, Sickle; D005319:Fetal Hemoglobin