Environmental factors: the forgotten stepchild of autism spectrum disorders

When people hear the word “heritability” in mathematical estimates, they automatically think “just genetics”.  That isn’t true, and this week epidemiologist Brian Lee from Drexel talks us through his SpectrumNews viewpoint about what heritability actually is and why there is room for environment.  Also this week, twin studies, which have traditionally used the word heritability to distinguish genetic vs. environmental interactions, are studied in a new light.  This one shows that severity and differences of autism across the spectrum in identical twins are caused by environmental differences – not just genetics.

https://www.ncbi.nlm.nih.gov/pubmed/31853901

Hip hip hooray for toddler interventions for autism

As always, good news and bad news in autism this week.  First the good news:  an intervention given between 9-14 months of age in children with a high probability of having an autism diagnosis improved autism symptoms at 3 years of age.  Now the bad:  mothers who experience severe childhood abuse are more likely to have a child with an autism diagnosis.  Why?  A new study explains it might have a lot to do with autism traits in the parents.  We would love to hear your thoughts on the results, please provide them in the comment section.