Support Organization for Trisomy 18, 13 and Related Disorders (SOFT) -- www.trisomy.org. This resource address the diagnosis of Trisomy 13: Medline Plus Encyclopedia: Trisomy 13,You might also find information on the diagnosis of Trisomy 13 in Educational resources and Patient support. These may also help you to read and learn more about Trisomy 13: Medline plus - Health information, Genetic and Rare Diseases Information Center. Information about genetic conditions and rare diseases: Educational resources. Information pages: Patient support . These are for healthcare professionals and researchers: ClinicalTrials.gov, PubMed.