Amniotic fluid optical density and fetal pulmonary.
D000653:Amniotic Fluid / Q000032:analysis*; D003720:Densitometry; D005260:Female; D005325:Fetal Organ Maturity; D006801:Humans; D008168:Lung / Q000196:embryology*; D055095:Optics and Photonics; D011247:Pregnancy; D011296:Prenatal Diagnosis