title: Creatine kinase activity in the amniotic fluid in cases of fetal lung immaturity.
mesh_terms: D000653:Amniotic Fluid / Q000201:enzymology*; D003402:Creatine Kinase / Q000032:analysis*; D005260:Female; D005325:Fetal Organ Maturity; D005865:Gestational Age; D006801:Humans; D008168:Lung / Q000196:embryology*; D011247:Pregnancy
chemical_list: D003402:Creatine Kinase