researchers are searching the factors of viral infections or during pregnancy will triggering autism. Undoubtedly, the chemical exposure also is one of the reason will cause to autism, the heavy metals such as mercury, pesticides and other contaminants will also easier affect the childhood development. On other autism theories, the immunity system could produce antibodies that might invasion children's brain and lead to autism.
Furthermore, in the early stage of brain growth, autism's children will grow faster than normal children but in the future, normal children's brain will grow faster than autism's children. The some factors of autism is from the disease, in the childhood stage, vaccines might cause autism, especially the measles, mumps or rubella but those information have not been proven. Most important are give children to gets all the safely childhood vaccines. Apart from this, opiate drugs also will affect the child become autism, for instance, opium, morphine and heroin. Those opiate drugs are very strong and having a deeply potential to affect children's health and lead to autism. Last but not the least, in genetics aspect, autism have the highly probability to heritable. In our findings, a family that have a child with autism means that the family might have a chance of having a second child with autism, and the percentage which is 1 per 20 means that it is 20 percent chance of having autism. According to the National Institutes of Health. That is a higher risk than in the general
population. Furthermore, if those children are twins, according to research found that if one twin has autism, the other twin are 90 percent chance of having the disorder. Based on our findings, women who are 35-year-old or older having 30 percent chance greater than women who are 25 to 29 years old of having an autism child. women who are 40-year-old having 50 percent change of having a child with autism than a women about 20 to 29 years old.