Screening for trisomies 21, 18 and 13 by maternal age, fetal nuchal translucency, fetal heart rate, free -hCG and pregnancy-associated plasma protein-A
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1998 ◽
Vol 92
(1)
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pp. 68-71
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2008 ◽
Vol 31
(6)
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pp. 618-624
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2009 ◽
Vol 2009
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pp. 31-32
Keyword(s):
1998 ◽
Vol 92
(1)
◽
pp. 68-71
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2007 ◽
Vol 276
(3)
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pp. 259-262
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2008 ◽
Vol 32
(4)
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pp. 488-492
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2020 ◽
Vol 8
(11)
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pp. 204-210
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2004 ◽
Vol 23
(1)
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pp. 19-22
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