Screening for trisomy 21 in twin pregnan
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Kevin Spencer
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Article
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2000
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John Wiley and Sons
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English
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๐ 1 views
In the ยฎrst trimester of pregnancy the biochemical markers free b-hCG and pregnancy associated plasma protein-A (PAPP-A) are used for the prenatal screening of trisomy 21, either alone or in combination with nuchal translucency (NT) thickness. In this study, I have analysed the distribution of these