- Chromosome 18 Registry & Research Society
 - Rainbows from Down Under
- Providing information and support for Trisomy 18, 13, and other related Chromosomal Disorders.
- Support Organization for Trisomy 13 and 18
- Info about annual conferences, literature, newsletter, and links to other resources for families having a child with Trisomy 18, 13, or other chromosome disorders.
- T18 Moms
- Resource site dedicated to families coping with a diagnosis of Trisomy 18, also known as Edwards syndrome.
- Trisomy 18 Support
- Provides information and guides for Trisomy 18 families to connect and share with each other.
- Trisomy Online
- Online support groups for those whose lives have been touched by the diagnosis of a trisomy chromosomal disorder.
- Wikipedia: Edwards Syndrome
- Article about Trisomy 18 also known as Edwards Syndrome. Includes causes, presentation, prognosis, and prevalence.
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