Chorionic villus sampling

Chorionic villus sampling is a technique used to collect chorionic tissue (villi) from the trophoblast (future placenta). As the chorionic cells and foetal cells have a common origin, their analysis is equivalent to a direct foetal analysis and can permit diagnosis of all chromosomal abnormalities and many genetic diseases for which the DNA can be studied.

The analysis is performed between the 10^th and 13^th weeks, under continuous ultrasound guidance. It is usually painless and does not require any local anaesthesia or special preparation.

The harvested cells are analysed in two steps: one rapid step that provides an initial result within 48-72 hours and a second step performed after culture, with a final result after 3 weeks.

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SISMeR provides its patients with useful information on topics related to infertility and Medically-Assisted Procreation techniques. For this, it has published a series of booklets that are given to patients when they visit their SISMeR Centre.