First Trimester Screening for Trisomy 21 by Maternal Age, Nuchal Translucency and Fetal Nasal Bone in Unselected Pregnancies
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2005 ◽
Vol 192
(4)
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pp. 1107-1111
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2007 ◽
Vol 196
(1)
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pp. e19
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2008 ◽
Vol 199
(5)
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pp. 521.e1-521.e5
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2015 ◽
Vol 36
(S 01)
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2019 ◽
Vol 220
(1)
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pp. S563-S564
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2004 ◽
Vol 44
(3)
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pp. 205-209
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2007 ◽
Vol 2007
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pp. 6-8
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