Second-trimester maternal serum screening for Down's syndrome: free β-human chorionic gonadotrophin (HCG) and α-fetoprotein, with or without unconjugated oestriol, compared with total HCG, α-fetoprotein and unconjugated oestriol

Author: Extermann P  

Publisher: Oxford University Press

ISSN: 1460-2350

Source: Human Reproduction, Vol.13, Iss.1, 1998-01, pp. : 220-223

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