title: Positive biochemical screening for trisomy 18: on the path of trisomy 9.
authors.affiliation: Prenatal Diagnosis Centre--Department of Gynecology and Obstetrics, Hospital de São João - EPE, Faculdade de Medicina do Porto, Portugal. amargpf@gmail.com
authors.forename: Ana
authors.initials: A
authors.lastname: Póvoa
authors.forename: Carla
authors.initials: C
authors.lastname: Ramalho
authors.forename: Ana
authors.initials: A
authors.lastname: Torgal
authors.forename: Otília
authors.initials: O
authors.lastname: Brandão
authors.forename: Alexandra
authors.initials: A
authors.lastname: Matias
authors.forename: Maria J V
authors.initials: MJ
authors.lastname: Oliveira
authors.forename: Nuno
authors.initials: N
authors.lastname: Montenegro
authors.forename: Sérgio
authors.initials: S
authors.lastname: Castedo
mesh_terms: D000328:Adult; D000649:Amniocentesis; D015415:Biomarkers / Q000097:blood; D002887:Chromosomes, Human, Pair 18 / Q000235:genetics*; D002899:Chromosomes, Human, Pair 9 / Q000235:genetics*; D020732:Cytogenetic Analysis; D005260:Female; D006801:Humans; D048208:Nuchal Translucency Measurement; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D014314:Trisomy / Q000175:diagnosis*
chemical_list: D015415:Biomarkers