title: Gas chromatographic analysis of concentrations of amino acids in amniotic fluid from early, middle, and late periods of human gestation.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D001331:Automation; D002849:Chromatography, Gas; D002852:Chromatography, Ion Exchange; D005260:Female; D005865:Gestational Age; D006801:Humans; D008722:Methods; D011247:Pregnancy
chemical_list: D000596:Amino Acids