Risk factors for autism and Asperger syndrome. Perinatal factors and migration.

The team looked at every child born in Sweden across several years.

They checked birth records for problems like low oxygen or early delivery.

They also noted where each mother was born.

Then they counted which children later got an autism or Asperger diagnosis.

Babies who had birth complications were more likely to receive an autism label.

The risk was highest when moms came from sub-Saharan Africa or East Asia.

Surprisingly, these factors did not raise the odds of Asperger syndrome.

Migration plus obstetric stress mattered for autism, but not for the milder form.

Bröring et al. (2018) extends the story: they show that very pre-term children display clear ASD symptoms at school age.

Their data add a timeline, proving that early birth complications can still shine through years later.

Hoksbergen et al. (2005) also extends the idea, but with a twist: severe early neglect in Romanian adoptees produced autism-like behaviors that eased with longer, stable care.

Both papers point to early adversity—biological or social—as a pivot point for later traits.

Burrows et al. (2018) offers a caution: maternal mood and education can tilt caregiver ratings.

So some of the risk we see may be boosted by how moms report, not just biology.

When you see a new client with autism, ask about birth history and family origin.

If mom mentions a tough delivery or that she grew up in Africa or Asia, note it, but do not treat it as destiny.

Use the info to watch for co-occurring medical issues, not to lower expectations.

Pair this history with solid assessment tools and keep your intervention goals high and clear.