Developmental paediatrics genetic testing is used to identify germline pathogenic variants that cause neurodevelopmental disorders, including global developmental delay, intellectual disability and autism spectrum disorder. These conditions are genetically highly heterogeneous, with causative variants distributed across hundreds of genes. Recognisable entities include e.g., the such as and , the imprinting disorders and, and , alongside other syndromes such as and . Inheritance is heterogeneous, spanning autosomal dominant, autosomal recessive and X-linked forms. establishes comprehensive genetic testing as a central, first- or second-tier tool in the paediatric work-up. A precise molecular diagnosis confirms the underlying condition, informs prognosis and recurrence-risk counselling, and increasingly guides access to emerging gene-targeted therapies.
Developmental paediatrics genetic testing
Genetic testing is considered when a child presents with unexplained developmental delay, intellectual disability, or autism. Identifying the underlying molecular cause confirms the diagnosis, informs recurrence-risk counselling and enables condition-specific management. For example, across 102 studies of 55,752 children with global developmental delay or intellectual disability, comprehensive genetic testing established a molecular cause in 37%.
Genetic testing is clinically relevant for the following indications, including but not limited to:
- Children with unexplained global developmental delay or intellectual disability
- Children diagnosed with autism spectrum disorder
- Infants with congenital anomalies or features suggesting a genetic cause
- Children with cerebral palsy of unexplained aetiology
Testing is typically requested by paediatricians, paediatric neurologists and clinical geneticists.
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