 Comparative genomic hybridization CGH-based microarrays are now often used during pregnancy in case of fetal polymalformation in order to assess significant genomic alterations. Up to now, in case of isolated heart defect, only fetal karyotype with FISH 22q11 was usually offered. However, micro deletions or duplications could not be identified elsewhere throughout the genome. Then, in case of fetal chromosomal micro-rearrangements, parents could not be fully informed for global and neurodevelopmental prognosis. To our knowledge, clear-cut study, to assess whether array-CGH provide a diagnostic utility in case of isolated congenital heart defect, dont exist. 