The antenatal diagnosis of trisomy 18.
D000015:Abnormalities, Multiple / Q000175:diagnosis / Q000235:genetics / Q000473:pathology; D000328:Adult; D000649:Amniocentesis; D001344:Autopsy; D002902:Chromosomes, Human, 16-18; D005260:Female; D005333:Fetus / Q000166:cytology; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012886:Skull / Q000002:abnormalities; D013577:Syndrome; D014314:Trisomy