Amniotic fluid test, amniotic fluid puncture
It is carried out from the 16th week of pregnancy (ideally during the 17th week of pregnancy) to examine the baby’s chromosomes. A very thin needle is inserted into the amniotic cavity under constant ultrasound guidance. The intervention only lasts a few minutes. Approx. 15 ml of amniotic fluid is extracted and cultures set up of the baby’s cells contained in the fluid. As these cell cultures need time to grow and multiply, the result of the amniotic fluid analysis is available around two weeks after the procedure.
Using fluorescence in situ hybridisation (FISH test), the most common genetic disorders (particularly trisomies 13/18/21) can be established within 1-2 days (quick test). This is not usually refunded, however, by the statutory health insurance schemes.
Determining a protein in the amniotic fluid (alpha fetoprotein), as well as an enzyme, enables defects in the spine (Spina bifida) to be detected with a high degree of certainty.
Amniocentesis and chorionic villus sampling are invasive procedures and therefore entail a risk You can find comprehensive information here.