title: A neural tube defect specific form of acetylcholinesterase in amniotic fluid.
mesh_terms: D000110:Acetylcholinesterase / Q000032:analysis*; D000653:Amniotic Fluid / Q000201:enzymology*; D000757:Anencephaly / Q000175:diagnosis; D002499:Centrifugation, Density Gradient; D004796:Clinical Enzyme Tests; D005260:Female; D006554:Hernia, Umbilical / Q000175:diagnosis; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016136:Spina Bifida Occulta / Q000175:diagnosis; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins; D000110:Acetylcholinesterase