title: [Trisomy 21: contribution of free beta HCG for the screening of pregnancies at risk].
authors.forename: O
authors.initials: O
authors.lastname: Dedeystère
mesh_terms: D000328:Adult; D000367:Age Factors; D006063:Chorionic Gonadotropin / Q000032:analysis*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D004314:Down Syndrome / Q000175:diagnosis / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008403:Mass Screening; D008875:Middle Aged; D010446:Peptide Fragments / Q000032:analysis*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000517:prevention & control*; D012307:Risk Factors
chemical_list: D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments