April 26, 2013 – Comment on this article
J Hitherto, trisomy 21, Down syndrome responsible, was the subject of a prenatal screening among mothers identified at risk through an amniocentesis or chorionic villus sampling (future placenta).
progress ethically
An invasive procedure n ‘ is not safe for both the fetus to the mother. The new prenatal test for genetic abnormalities on simple blood test is already available in Germany, Austria, Switzerland and Liechtenstein, is an undeniable progress, the National Consultative Ethics Committee (CCNE), which is in favor its introduction in France, in an opinion released yesterday. The advantages of the new process? Easier, technically, with fewer side effects (including miscarriages), and ultra-early, allowing to terminate a pregnancy in the time of the abortion. The Committee considers that these new tests should be reserved at first, identified at-risk pregnant women, and they can not replace the current diagnostic karyotype (chromosome analysis). Indeed, in 5% of blood samples, the results are not interpretable due to technical reasons. In addition, the false positive rate of about 0.2%, still requires to validate the result by conventional karyotype
that.
The cost of these tests (850 to 1250 euros depending on the supplier) and the organization controlled dissemination must also be taken into account before moving to a larger scale, advocates CCNE. Trisomy 21 or Down syndrome, whose frequency was estimated in the early 1990s to one in 800 for a birth in 2000, since the screening (paid) is offered to all pregnant women (about 800,000 per year). It combines a screening blood test for pregnant women seeking risk markers and ultrasound for fetal. When the risk is less than 1/250, the woman was offered an amniocentesis, which carries a risk of miscarriage estimated between 1/300 and 1/100.
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