Serum free thyroxine in pregnancy.
D005260:Female; D006801:Humans; D011247:Pregnancy; D011863:Radioimmunoassay / Q000379:methods; D013974:Thyroxine / Q000097:blood*; D013975:Thyroxine-Binding Proteins / Q000032:analysis
D013975:Thyroxine-Binding Proteins; D013974:Thyroxine