Article
Screening for trisomy 21 in twin pregnancies in the first trimester using free ?-hCG and PAPP-A, combined with fetal nuchal translucency thickness
1 Feb 2000
Abstract excerpt
In the first trimester of pregnancy the biochemical markers free beta-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 biochemical markers in 159 twin pregnancies and compared this with 3466 singleton pregnancies. On average free...
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