Neural tube defects in trisomy 18.
D000328:Adult; D000757:Anencephaly / Q000235:genetics; D002902:Chromosomes, Human, 16-18; D005260:Female; D006801:Humans; D008297:Male; D009436:Neural Tube Defects / Q000235:genetics*; D010641:Phenotype; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014314:Trisomy