This test obtains foetal blood by direct puncture of the funicular vessels (umbilical cord) under ultrasound or foetoscopic guidance (a foetoscope, an optical instrument that is inserted into the amniotic cavity through the abdomen).

The main indications of this technique include: Rapid assessment of foetal chromosomes (results can be obtained within 24 to 48 hours), immunological assessment of the foetus, and assessment of certain haemopathies or blood disorders.

This test is usually performed after the 20th week of pregnancy......................


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