Not necessarily: Hemoglobin is the molecule which binds oxygen in red blood cells. Hemoglobin f is usually only present during birth and then for most people a different type of hemoglobin "takes over". Continued presence of Hemoglobin F can suggest a disorder of hemoglobin like thallesemia.
Answered 2/6/2014
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F is not "failing": In this term, f is short for fetal - having to do with the blood flowing in an unborn or just born baby. From 3rd month of pregnancy via umbilical cord thru 6 months of age, this type of hemoglobin provides oxygen for the baby. Ask the doctor who gave you the summary to explain the parts about you and what they mean. Don't be worried about this term. Unless you are pregnant, it's not relevant.
Answered 2/6/2014
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