![First Trimester Screening for Trisomy 21 by Maternal Age, Nuchal Translucency and Fetal Nasal Bone in Unselected Pregnancies | IntechOpen First Trimester Screening for Trisomy 21 by Maternal Age, Nuchal Translucency and Fetal Nasal Bone in Unselected Pregnancies | IntechOpen](https://www.intechopen.com/media/chapter/18452/media/image6.png)
First Trimester Screening for Trisomy 21 by Maternal Age, Nuchal Translucency and Fetal Nasal Bone in Unselected Pregnancies | IntechOpen
![SOLVED: The rate at which the risk of Down syndrome changing approximated by the function r(x) 0.004641x2 0.3012x 4.9 (20 < x < 45) where r(x) is measured in percentage of all SOLVED: The rate at which the risk of Down syndrome changing approximated by the function r(x) 0.004641x2 0.3012x 4.9 (20 < x < 45) where r(x) is measured in percentage of all](https://cdn.numerade.com/previews/d05f0185-f0ff-4963-9b54-8f189f5a66d3_large.jpg)
SOLVED: The rate at which the risk of Down syndrome changing approximated by the function r(x) 0.004641x2 0.3012x 4.9 (20 < x < 45) where r(x) is measured in percentage of all
![Risk at term (expressed as a reciprocal) of Down syndrome vs maternal... | Download Scientific Diagram Risk at term (expressed as a reciprocal) of Down syndrome vs maternal... | Download Scientific Diagram](https://www.researchgate.net/profile/Philippe-Aegerter/publication/12868550/figure/fig1/AS:601616176668703@1520447882459/Risk-at-term-expressed-as-a-reciprocal-of-Down-syndrome-vs-maternal-age-in-years-in_Q640.jpg)
Risk at term (expressed as a reciprocal) of Down syndrome vs maternal... | Download Scientific Diagram
![PDF) Software for Prenatal Down Syndrome Risk Calculation: A Comparative Study of Six Software Packages PDF) Software for Prenatal Down Syndrome Risk Calculation: A Comparative Study of Six Software Packages](https://www.researchgate.net/profile/Philippe-Aegerter/publication/12868550/figure/tbl1/AS:601616176668704@1520447882474/Number-of-control-patients-529-cases-and-Down-syndrome-cases-included-in-the-at-risk_Q320.jpg)