title: The estimation of oestriol in amniotic fluid: a comparison of three methods.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D002845:Chromatography; D002849:Chromatography, Gas; D004964:Estriol / Q000032:analysis*; D005260:Female; D006801:Humans; D008722:Methods; D011247:Pregnancy; D013053:Spectrophotometry; D014316:Tritium
chemical_list: D014316:Tritium; D004964:Estriol