This procedure can be done once enough amniotic fluid has developed to sample.
Cells from the foetus will be floating in this fluid, and can be separated and tested for chromosome study.
Miscarriage risk of amniocentesis is commonly quoted as 0,06%.
By amniocentesis is also possible to cryopreserve amniotic stem cells.
Time to perform an amniocentesis is after 15 weeks of amenorrhea.
