Down Syndrome (Trisomy 21)
A chromosomal condition caused by a full or partial extra copy of chromosome 21.
What is Down Syndrome?
Down syndrome is a chromosomal condition in which a person is born with an extra copy of chromosome 21. It is one of the most common chromosomal conditions, occurring in approximately 1 in 700 births. Down syndrome causes intellectual disability, characteristic physical features, and increased risk of certain health conditions. However, the degree of intellectual disability varies widely — with inclusive education and appropriate support, many people with Down syndrome lead rich, independent lives. Life expectancy has increased dramatically and now typically extends into the 60s.
Signs to look for
- Low muscle tone (hypotonia) in infancy
- Characteristic facial features (almond-shaped eyes, flat nasal bridge)
- Delayed motor and speech milestones
- Intellectual disability (ranges from mild to moderate)
- Hearing and vision problems
- Increased risk of congenital heart defects
- Short stature
These are common indicators, not a diagnostic checklist. Only a qualified professional can diagnose Down Syndrome.
Support strategies
Early intervention is key
Starting PT, OT, and speech therapy in infancy produces the greatest long-term outcomes. Early intervention programmes exist in most provinces.
Inclusive education in mainstream schools
Many children with Down syndrome thrive in mainstream classrooms with appropriate support. The SIAS process can unlock a full-time aide.
Focus on strengths
Children with Down syndrome typically have strong visual learning, social skills, and long-term memory. Build on these.
Health monitoring
Regular hearing, vision, thyroid, and cardiac checks are important. Ensure your child has a developmental paediatrician in their care team.
SASSA Grants
Children with Down syndrome whose condition requires full-time care qualify for the Care Dependency Grant (~R2,320/month). This is one of the more straightforward CDG applications — a paediatrician or specialist can provide the supporting letter. The Child Support Grant is also available to eligible caregivers.
Check eligibility →School rights & resources
Community posts
Connect with other parents navigating Down Syndrome in South Africa — share experiences, ask questions, and find peer support.
View Down Syndrome posts →Find services near you
Schools, therapists, NGOs, and clinics that work with Down Syndrome in South Africa.
Search directory →SA organisations
- Down Syndrome South Africa
- Down Syndrome Association of Cape Town
Information is for guidance only. Always consult qualified healthcare professionals for diagnosis and treatment planning.