Management of pregnancy when maternal blood has a very high level of fetal haemoglobin.

Abstract excerpt

Fetal blood normally has a higher oxygen affinity than maternal blood because of the predominance of haemoglobin (Hb) F in the former and of Hb A in the latter; this predominance facilitates the transfer of oxygen from maternal to fetal blood. We report two patients who had exclusively or predominantly Hb F in their blood and were managed differently. When patient 1 became pregnant she had regular exchange blood...

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