The exact cause of ASD is presently unknown. The most current research demonstrates that there’s no one single cause. Both genetics and environment may determine whether a person develops autism.
Some of the suspected risk factors for autism include:
- Having an immediate family member with autism;
- Genetic mutations, fragile X syndrome, Rett syndrome and other genetic disorders;
- Being born to older parents;
- Pregnancy complications (being born premature, having low birth weight, being one of twins / triplets, etc.);
- Having pregnancies less than 1 year apart;
- Metabolic imbalances;
- Exposure to heavy metals and environmental toxins;
- A history of viral infections;
- Fetal exposure to some medications.
However, all of the above increase the risk of autism. Just because an individual is exposed to some of these factors, does not mean that he or she will develop ASD.
Multiple research across the world demonstrates: Vaccines do NOT cause autism.
Cause and Effect: We do not yet know exactly how the above risk factors combine to cause autism. However, it is likely that crucial aspects of early brain development are affected. In some individuals it appears that brain nerve cells, or neurons, cannot properly communicate with each other. In other individuals, entire regions of the brain cannot properly communicate with each other.
Learn more about living with autism spectrum
