Which of the following statements regarding screening for Down's Syndrome via blood work is NOT accurate?

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Prenatal screening on blood samples is becoming the norm and reducing amniocentesis testing.This less invasive blood test determines whether the fetus has a chromosomal abnormality (Down syndrome-chromosome 21, or other chromosomes-13, 18, X & Y) by testing free DNA.If the finding is abnormal, amniocentesis is used to confirm the original result.In this study, of 125, 426 blood samples, 3% were found to be abnormal.What is interesting about this study is that this prenatal screening may not only identify problems in the fetus but also identify problems in the mother's cells' arrangement indicative of cancer.From the set of 3757 abnormal fetal results, 10 cases of maternal cancer were found.The uses of genomic testing are just beginning to be realized and may lead in directions unexpected from the original purpose of the screening.While less accurate as a method of chromosomal abnormality detection, the screening via blood work is far less invasive than amniocentesis.Accordingly, blood work testing has cut down on the need for more invasive screening.Only care recipients with positive results for the blood work need have the amniocentesis procedure.As an additional benefit, the blood work testing can detect cases of occult maternal malignancies.

Which of the Following Statements Regarding Screening for Down's Syndrome