title: First trimester maternal serum placental growth factor in trisomy 21 pregnancies.
authors.affiliation: Prenatal Research Unit, Clinical Biochemistry Department, King George Hospital, Goodmayes, UK.
authors.forename: N J
authors.initials: NJ
authors.lastname: Cowans
authors.forename: A
authors.initials: A
authors.lastname: Stamatopoulou
authors.forename: K
authors.initials: K
authors.lastname: Spencer
mesh_terms: D015415:Biomarkers / Q000097:blood; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood; D004314:Down Syndrome / Q000097:blood* / Q000000981:diagnostic imaging; D005260:Female; D005865:Gestational Age; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D048208:Nuchal Translucency Measurement; D000072483:Placenta Growth Factor; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000097:blood*; D011261:Pregnancy Trimester, First / Q000097:blood*; D011266:Pregnancy-Associated Plasma Protein-A / Q000032:analysis; D012189:Retrospective Studies
chemical_list: D015415:Biomarkers; D018997:Chorionic Gonadotropin, beta Subunit, Human; C000608036:PGF protein, human; D011257:Pregnancy Proteins; D000072483:Placenta Growth Factor; D011266:Pregnancy-Associated Plasma Protein-A