Addendum to: Genetics in Medicine 7:650–654 (2005); https://doi.org/10.1097/01.gim.0000186545.83160.1e, published online 01 November 2005

This document was retired by the ACMG Board of Directors as of 18 May 2020 with the following addendum:

Due to technological advances in the field of cytogenetics, and their resultant impact on the practice of clinical genetics since publication of this guideline, this document has been retired. Guidance from the ACMG regarding current application of cytogenetic technologies, including chromosome microarray (CMA) in the clinical genetic evaluation of individuals with developmental delay, intellectual disability, or autism spectrum disorders, is available.1,2