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 18
(6)
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pp. 585-589
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1993 ◽
Vol 6
(2)
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pp. 91-94
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Keyword(s):
1996 ◽
Vol 16
(12)
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pp. 1095-1100
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Keyword(s):
1988 ◽
Vol 171
(2-3)
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pp. 325-331
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Keyword(s):
1991 ◽
Vol 155
(4)
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pp. 280-280
Keyword(s):
1991 ◽
Vol 155
(2)
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pp. 67-68
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Keyword(s):
1999 ◽
Vol 106
(6)
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pp. 598-600
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