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Résumé La présence d’ADN fœtal libre circulant dans le plasma (ou le sérum) maternel a été mise en évidence par Lo et al. en 1997. En 2002, cet ADN foetal devient un outil de diagnostic prénatal. Les cellules trophoblastiques en sont probablement la source principale. Contrairement aux cellules foetales circulantes qui sont également étudiées comme possible alternative, mais dont l’analyse se heurte...
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