Why Children Need Blood Tests
Routine blood tests in childhood help catch growth, nutrition and developmental issues early, when they're easiest to treat. Most healthy children need far fewer tests than adults.
Newborn Screening
Performed within the first days of life, newborn screening checks for rare but serious genetic, metabolic and hormonal conditions (such as congenital hypothyroidism and PKU) via a simple heel-prick blood sample.
Common Tests by Age
| Age | Common Tests |
|---|---|
| Birth | Newborn screening panel |
| 9–12 months | Haemoglobin/CBC (anaemia screening), lead level check |
| 1–5 years | CBC if symptoms present; lead screening in at-risk areas |
| School age | CBC, Vitamin D if deficiency suspected |
| Adolescents | Cholesterol screening, thyroid if symptoms, glucose if risk factors present |
Common Reasons for Testing
- Unexplained fatigue or paleness (anaemia screening)
- Growth concerns
- Recurring infections
- Family history of a genetic or metabolic condition
- Before starting certain medications
Tips for Parents
- Explain the test simply and honestly to reduce anxiety
- Bring a comfort item or distraction for younger children
- Ask the lab about pediatric-specific needles or numbing cream if needed
- Most routine paediatric blood tests use very small sample volumes
Important: Testing schedules vary by country and individual risk factors. Always follow your pediatrician's specific recommendations.