Seed divx Doctors have been able to test unborn babies for Down syndrome and other birth defects for a while now, but these invasive procedures (such as amniocentesis and chorionic villus sampling, or CVS) posed a risk to the unborn baby. However, a newly developed blood DNA test has been developed that poses no risk to the fetus.
Running with Scissors movie The test requires only a small blood sample from the mother, whereas the old tests require sticking a needle in the uterus or snipping off a small piece of the placenta for analysis. The old tests are done after the 15th week of pregnancy (with results in two to three weeks). The new blood test can be done very early in a pregnancy at five weeks after conception (with results in a few days).
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While all of the tests look for Down syndrome, other serious chromosomal conditions can be detected by the new test. It can detect the presence of Edward syndrome, a syndrome that occurs in approximately one in 6,000 live births and has a very low rate of survival. Patau syndrome can also be detected with the new test. The condition causes physical and mental abnormalties, especially around the heart. It affects about 1 in 12,000 live births.
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While there are other noninvasive prenatal tests available, such as the ultrasound, they cannot diagnose with certainty. A much larger study of the new test is needed to confirm results, and the test could become widely available in the next two to three years. The current cost is around $700, but that cost will drop considerably if the test becomes widely used.
