The CGH array is a very powerful technique that allows gains or losses of genetic material to be detected in any part of the genome in a fast and efficient manner.

Its sensitivity for detecting these types of mutations is much higher than that for other techniques, such as karyotyping.

CGX is a specific design of the CGH array that is particularly useful for analysing regions associated with known clinical phenotypes or syndromes caused by variations in the number of copies, thereby increasing its clinical utility and diagnostic precision.