Chorionic villus sampling (placental biopsy)
CVS is carried out from the 11th week of pregnancy onwards. Under continuous ultrasound guidance a small sample of cells is taken from the placenta by passing a fine needle through the skin of the abdominal wall. Results in terms of number and structure of the chromosomes are usually obtained within two days.
Amniocentesis and chorionic villus biopsy are recognized as invasive diagnostic tests that do pose potential risks. For more detailed information, please go to the downloads area