Advances in diagnostic capabilities and greater understanding and awareness of autism spectrum disorder seem to be largely driving the increase, the Rutgers researchers said. But there's probably more to the story: Genetic factors, and perhaps some environmental ones, too, might also be contributing to the trend.
Risk Factors
Having a sibling with ASD. Having certain genetic or chromosomal conditions, such as fragile X syndrome or tuberous sclerosis. Experiencing complications at birth. Being born to older parents.
For now, we don't know the exact cause of autism however research suggests it's a combination of developmental, genetic and environmental factors.
Increased availability of services.
Over the years, services for autism have become more readily available. The availability of services has encouraged more people to seek a diagnosis in order to gain access to these services.
Does The Father Or Mother Carry The Autism Gene? Autism was always thought to have a maternal inheritance component, however, research suggests that the rarer variants associated with the disorder are usually inherited from the father.
The country with the highest rate of diagnosed autism in the world is Qatar, and the country with the lowest rate is France. Around 4 times as many boys have autism as girls. The rate of autism in the U.S. went from 1 in 150 in 2000 to 1 in 100 in 2022.
There's no way to prevent autism spectrum disorder, but there are treatment options. Early diagnosis and intervention is most helpful and can improve behavior, skills and language development. However, intervention is helpful at any age.
A common question after an autism diagnosis is what is the cause of autism. We know that there's no one cause of autism. Research suggests that autism develops from a combination of genetic and nongenetic, or environmental, influences. These influences appear to increase the risk that a child will develop autism.
High levels of stress during pregnancy may also be connected to autism in children. This connection appears to have the most impact when the parent experiences stress between weeks 25 and 28 of pregnancy.
It's something you're born with. Signs of autism might be noticed when you're very young, or not until you're older. If you're autistic, you're autistic your whole life. Autism is not a medical condition with treatments or a "cure".
It's a common misconception that autistic people are unaware of their condition. The truth is, many autistic people are very much aware of their autism and how it affects them. In fact, some say that it's through understanding and acceptance of their autism that they've been able to lead fulfilling lives.
It is estimated that 1 in 100 people in Australia have Autism. In 2018 there were 205,200 Australians with Autism, a 25.1% increase from the 164,000 in 2015 (Source: ABS SDAC 2018– Autism in Australia). This means that if you have Autism you are not alone.
“Firstborn offspring of two older parents,” Durkin's study noted, “were three times more likely to develop autism than were third- or later-born offspring of mothers aged twenty to thirty-four and fathers aged under forty years.”
Research shows that autism can indeed run in families. If you already have one child with ASD, you have a 1 in 5 chance of your next child developing autism. If you have more than one child with ASD, the odds of having another child with ASD are even higher.
Genetics. Genetic factors may be the most significant cause of autism. Early studies of twins had estimated heritability to be over 90%, meaning that genetics explains over 90% of whether a child will develop autism. This may be an overestimation, as later twin studies estimate the heritability at between 60 and 90%.
Advanced parental age at time of conception. Prenatal exposure to air pollution or certain pesticides. Maternal obesity, diabetes, or immune system disorders. Extreme prematurity or very low birth weight.
Avoid foods that have artificial dyes, colors, flavors, additives, and preservatives. Once again these are good for all people to avoid but especially children with autism as it can cause issues with development. It can also cause stomach irritation as well as being linked to disrupting normal emotional processing.
According to the CDC, the prevalence of autism in the United States is approximately 1 in 54 children. This means that the odds of having a child with autism are less than 2%.
Globally, the World Health Organization estimates that the prevalence of autism spectrum disorder (ASD) is one per 160 children. The prevalence in the Middle East is still unknown, largely due to a lack of diagnoses or a lack of acceptance from parents.
In a pair of new reports — one focused on 8-year-olds and one on 4-year-olds — the CDC found that 1 out of every 36 children has autism. This is a significant increase from the 2021 estimate of 1 in 44, which was a big jump from 1 in 110 in 2006.
The number of children known to have autism has increased dramatically since the 1980s, at least partly due to changes in diagnostic practice; it is unclear whether prevalence has actually increased; and as-yet-unidentified environmental risk factors cannot be ruled out.