Abstract Abstract: Array-based comparative genomic hybridization is being increasingly used in patients with learning disability (mental retardation) and congenital anomalies.

Combining CGH with Microarrays: The Development of Array CGH Figure 1: Diagram of the microarray-based comparative genomic hybridization (aCGH) process.

Allison explained: “Human genome sequencing, exome sequencing, and even CGH array all look for additions, duplications, or something missing from the DNA.