Thyroid hormone assessment in children with Down Syndrome

What is Down Syndrome?

Down syndrome is a genetic condition that happens when a person has an extra copy of chromosome 21 – so instead of the usual 46 chromosomes, they have 47. This difference influences how their body and brain grow. Children with Down syndrome may learn at their own pace, have unique physical features, and be prone to certain health issues. But with love, understanding, early support, and proper health care, individuals with Down syndrome can lead fulfilling, meaningful lives.

Why is thyroid important for children with Down syndrome?

Thyroid gland hormones influence nearly every part of our body – how we grow, use energy, think, and stay well. There are two main thyroid issues:

• Hypothyroidism (low thyroid): Leads to fatigue, slower growth, weight gain, low energy, constipation, dry skin, and mood changes. For a child with Down syndrome, untreated low thyroid can further slow development and learning pace.
  
• Hyperthyroidism (high thyroid): Less common, but may lead to restlessness, weight loss, heat intolerance, and rapid heartbeat.
  

Children with Down Syndrome are more likely to develop hypothyroidism at some point in life. That’s why regular monitoring is key, it helps catch hormone changes early when treatment is straightforward and helpful.

Recommended thyroid screening schedule

To take good care of your child’s health, it’s suggested to:

• Test at birth – Doctors often screen thyroid hormone levels shortly after birth.
• Every 6 months until age 4 – During early childhood, thyroid output can change quickly, making regular checks important.
• Every 6–12 months from age 4 onward – Routine checks help ensure long-term wellness.
• More frequent checks if needed – If your child has symptoms or other medical issues, hormones may be tested more often.
  

Always keep a health record of past test dates and results, that way, no visit or test slips through the cracks.

Who should you see?

1. Paediatrician
   
   • Conducts thyroid hormone blood tests and guides care.
   • Tracks growth, milestones, and health changes.
     
2. Endocrinologist
   
   • A specialist for hormonal care.
   • Ideal for long-term monitoring every 1–2 years or sooner if prescribed.
     

How is hypothyroidism treated?

If a test indicates low thyroid levels:

• Your paediatrician refers you to an endocrinologist.
• They prescribe daily thyroid hormone tablets at a personalized dose.
• These tablets gently restore normal hormone levels, supporting growth, energy, attention, and overall development.
• Regular follow-up ensures the dose stays right as the child grows.
  

Why regular testing matters

• Detects low thyroid early, before symptoms become more obvious.
• Supports better energy levels, growth, focus, and mood.
• Helps maintain progress in learning, motor skills, and everyday participation.
• Prevents setbacks like slower growth, low energy, constipation, or poor attention.

How parents can help

• Use a chart or calendar to track thyroid test dates and results.
• Talk to your paediatrician or endocrinologist if you notice symptoms, like tiredness, slow growth, mood shifts, or constipation.
• Be consistent with medication – daily intake helps manage associated conditions and ensures steady growth. 
• Advocate for your child’s health by asking questions and learning about thyroid care.

More health checks for children with Down syndrome

Alongside thyroid, remember other regular health reviews your child needs over time:

• Heart evaluation – Common in infancy (via echo).
• Hearing and vision tests – Scheduled yearly during early years.
• Growth and nutrition – Ongoing monitoring by a paediatrician.
• Dental exams – Every six months.
• Orthopedic checkups – To address low muscle tone, flat feet, or joint flexibility.
• General physician visits – For vaccines and everyday health conditions.
• Neurologist or developmental doctor visits – For developmental delays or therapies.

A shared file or binder helps you manage all these appointments in one place.

Putting your child’s health first

If your child has Down syndrome, taking care of their thyroid is one of the best ways to support their growth and energy. The path is clear:

1. Get screened early and often – Every 6 months until age 4, then annually.
   
2. Stay in partnership with your paediatrician and endocrinologist – Their care influences your child’s present and future well-being.
   
3. Treat hypothyroidism consistently – Daily medication works wonders when dosage is monitored regularly.
   
4. Track overall health – Watch for heart, hearing, vision, bone, dental, and developmental changes.

Regular thyroid monitoring is an easy way to support your child’s strength, energy, and joy. When combined with therapies, love, learning, and community, these steps help your child live their fullest, most thriving life.

Special credits: The majority of the content above has been adapted from Dr Jayashree Gopal, Endocrinologist presentation at IIDSC held in 2017, organised by  DSFI, Thanks to Dr. Nina Piyush Vaidya, Consultant Pediatrician, (M.B D.Ped, PGDGC) who has offered expert guidance in consolidating this information. We would also extend our thanks to Dr Leenatha Jakkidi, Pediatric Endocrinologist for addressing subsequent queries that have been amended to the existing resource above.

You may download this infographic and presentation that highlights the most common health challenges that individuals with Downs syndrome are more prone to than others.

Need support?
If you’d like more support with Down syndrome, development, or health, reach out to the Nayi Disha helpline at 844‑844‑8996. We speak English, Hindi, Malayalam, Gujarati, Marathi, Telugu, and Bengali.

Disclaimer: This information is meant for awareness and support. Please consult a qualified healthcare practitioner for proper guidance.