The etiology of autism spectrum disorder encompasses the biological, genetic, and environmental factors that contribute to its development. Understanding etiology is important for prevention research, early detection, and developing targeted interventions.

Genetic Etiology

Genetics account for the majority of autism risk. Both common genetic variants (each contributing small risk) and rare variants (contributing larger risk individually) are involved. Identified genetic contributions include de novo mutations, inherited common variants, copy number variations, and single-gene conditions like Fragile X.

Environmental Etiology

• Prenatal factors: advanced parental age, certain medications, maternal illness
• Perinatal factors: prematurity, birth complications, low birth weight
• Gene-environment interactions: environmental factors may affect individuals with genetic predisposition differently

Neurobiological Mechanisms

The neurobiological pathway involves altered neuronal migration, synaptic development, and neurotransmitter systems. These changes occur during prenatal brain development and affect lifelong brain function.

Regardless of etiology, ABA therapy provides effective support. Contact Treetop ABA Therapy.