The chance of autism at pregnancy age is a complex question that depends on many factors. While there is no single answer for the chances of a child being born with autism, there are certain risk factors that can increase the likelihood of having a child with autism.
Genetics
Genetic mutations are the most significant risk factor for developing autism. It is estimated that about 20% of cases of autism spectrum disorder (ASD) are due to a single gene mutation. Mutations in certain genes are associated with an increased risk of developing autism. The genes most commonly associated with autism are those involved in the development and function of the brain, such as the protein coding gene SHANK3.
Environmental Factors
Environmental factors, such as exposure to certain toxins or infections, may also increase the risk of autism. For example, exposure to certain chemicals, such as pesticides, during pregnancy has been linked to an increased risk of autism. Additionally, a virus or infection during pregnancy has also been linked to an increased risk of autism.
Age of Parents
The age of the parents may also play a role in the risk of autism. Research shows that the risk of having a child with autism increases with the age of the mother and father. Specifically, the risk of autism increases with the age of the father when he is over 40 and the age of the mother when she is over 35.
Family History
A family history of autism also increases the risk of having a child with autism. If a first-degree relative, such as a parent or sibling, has autism, the risk of having a child with autism is increased.
Overall, the chance of having a child with autism is complex and depends on various factors. While there is no single answer for the chances of a child being born with autism, knowing the risk factors can help parents make informed decisions about their pregnancy.