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A prospective trial of prenatal screening for Down syndrome by means of maternal serum α-fetoprotein, human chorionic gonadotropin, and unconjugated estriol

FertilityHuman Chorionic GonadotropinReproductive HealthGynecologyProspective TrialHigh-risk PregnancyReproductive EndocrinologyPublic HealthDown SyndromePrenatal Genetic ScreeningMaternal HealthPlacental DiseasePrenatal DiagnosisMaternal-fetal MedicinePrenatal TestingPlacental FunctionPrenatal Genetic TestingPediatricsMedicine