Do twins have a higher rate of autism?
Several small studies conducted over the last three decades have found that it is much more common for identical twins to be diagnosed with autism than it is for fraternal twins.
Why is autism more common in twins?
Studies in twins have shown that autism has genetic origins: A child is more likely to have autism if his or her sibling or twin also has the disorder. But there is also evidence that factors other than genetics, collectively referred to as ‘the environment,’ play a role.
How common is it for twins to have autism?
Studies in identical twins have shown that autism has a strong genetic basis: If one identical twin has autism, the other one has it, too, as much as 90 percent of the time. The new work supports these estimates: In 64 of the 78 twin pairs, both twins have an autism diagnosis.
Are twins more likely to have disabilities?
A number of studies have shown that, even among children of similar birth weight and gestational age, twins are more likely to suffer from the disorder.
Are twins more likely to have mental illness?
The Journal of Psychiatric Practice has published new research on mental health in parents of multiples (twins, triplets, etc.). Parents of multiples reported higher rates of depression and anxiety than other parents.
Are twins more likely to have ADHD?
According to an Australian study , twins are more likely to have ADHD than singletons. Additionally, a child who has an identical twin with ADHD has a high chance of also developing the disorder.
Are there autistic twins?
While many genetic studies have confirmed that when one identical twin has autism, the other is highly likely to also have autism, few have looked at the differences in severity of traits between identical autistic twins.
Can you have identical twins and not be autistic?
Identical twins share nearly all of their genetic information, so it would be expected that both twins would fall on the autism spectrum if there were a genetic cause. Research has shown that when one identical twin is on the autism spectrum, the other twin also falls on the autism spectrum in 60-90% of the cases.
Is it possible for twins to have Aspergers?
In identical twin sets where both children had some form of ASD, it was very unusual for one to have Asperger’s and the other to have autism or PDD-NOS. In other words, when one identical twin had Asperger’s, the other usually, did, too.