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Meta navigation Main navigation Main navigation Celebrate World Down Syndrome Day with NDSS NDSS empowers individuals with Down syndrome and their families by driving policy change providing resources engaging with local communities and shifting public perceptions. NDSS Down Syndrome Advocacy Conference Join us for the annual Down Syndrome Advocacy Conference April 28 April 30 2025. This transformative threeday event brings together advocates families professionals and individuals with Down syndrome to learn connect and inspire change on Capitol Hill. Immerse yourself in learning sessions our communitys legislative priorities and gain valuable resources to empower the Down syndrome community.