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

1998 ◽  
Vol 13 (1) ◽  
pp. 220-223 ◽  
Author(s):  
P. Extermann ◽  
P. Bischof ◽  
P. Marguerat ◽  
B. Mermillod
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