Since the implementation of early detection of hereditary diseases, invasive samples from pregnant women such as amniocentesis have been reduced by 40%.
The implementation of early screening in 2009 made it possible to reduce by 40% invasive samples, such as amniocentesis or chorionic vilosity biopsy, performed as part of prenatal diagnosis. Good news because if these techniques are 100% reliable to know if the fetus is the carrier of an inherited disease, they cause a miscarriage in 1% of cases. Miscarriages which concern 95% of healthy fetuses …
In 2009, nearly 80,000 women had amniocentesis, this long needle mounted on a syringe that passes through the mother’s abdomen to withdraw 20ml of amniotic fluid. But thanks to the implementation of a new early detection technique in 2009, this type of sample fell to 55,000 in 2010, then to 45,000 in 2011 according to the latest report by the National Biomedicine Agency. The agency also notes that the number of trisomy 21 and unbalanced chromosomal abnormalities has remained stable despite this decrease in invasive samples. “This indicates better care for pregnant women”, welcomes the agency.
What is the early detection technique? The technique is based on a risk calculation carried out using three parameters which are the age of the woman, the thickness of the neck of the fetus and the dosages of the maternal serum markers PAPPA and HCG-beta. Only women most at risk are offered a diagnosis made on an amniocentesis.
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