The cause of autism is not attributed to a single factor, as researchers have not identified a singular trigger for its development. Instead, it appears to result from a combination of various factors. Genetic and environmental influences are believed to play essential roles in the development of autism.   Genetic factors involve certain gene variants that some individuals inherit from their parents. While inheriting these gene variants may increase the likelihood of autism, it does not guarantee that a child will have the condition.   Environmental factors also contribute to the development of autism. These factors include exposure to certain infections or medications during pregnancy, very low birth weight, maternal obesity, and advanced parental age at the time of conception. However, further research is necessary to fully confirm the significance of these environmental factors concerning autism.