title: Measurement of choriogonadotropin free beta-subunit: an alternative to choriogonadotropin in screening for fetal Down's syndrome?
authors.forename: G J
authors.initials: GJ
authors.lastname: Knight
authors.forename: L A
authors.initials: LA
authors.lastname: Cole
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood*; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D011296:Prenatal Diagnosis / Q000379:methods*; D012307:Risk Factors
chemical_list: D006063:Chorionic Gonadotropin