
The actual causes of Autism are unknown at this time. Biological or environmental variables may be at blame: 1. Based on data from five nations, the heritability of ASD was estimated to be 80%. It suggests that ASD can be caused by inherited genetic effects from either the mother or the father. 2. According to a study of 277 twin pairs, having a sibling with ASD increases the likelihood of having ASD. 3. A research of ten US study sites found that the incidence of ASD increased as parents got older. 4. Pregnant women who took the prescription medicines thalidomide and valproic acid had a greater risk of autism spectrum disorder (ASD). 5. According to another study, the onset of ASD might occur before, during, or after delivery. 6. Children born prematurely are at a higher risk of developing ASD. 7. There is a high prevalence of ASD in children with Down syndrome. ASD is also connected to chromosomal abnormalities such as Fragile X Syndrome and tuberous sclerosis. 8. Environmental cont...