Autism and intelligence share genetic variants, researchers grow Neanderthal mini-brains and see overlap with autism, and maternal diabetes is an autism risk factor.

Many people with fragile X syndrome show average rates of protein production, challenging a long-held assumption about the condition.

A checklist for fragile X syndrome could help identify people with the condition in low-resource settings, France unveils a plan for early diagnosis and education of children with autism, and virally inserted ‘bar codes’ help track individual neurons.

A modified version of the genetic engineering tool CRISPR may restore expression of the gene mutated in fragile X syndrome.

A semirural Colombian town called Ricaurte is home to the largest recorded genetic cluster of people with mutations linked to fragile X syndrome.

Theory of mind develops surprisingly early, a book publisher doubles down in defense of a controversial author, and false vaccine news gets a correction.

Mice with the mutations linked to tuberous sclerosis make too little protein in their brains — a finding that contradicts a leading theory about the condition.

The drug rapamycin, which is in clinical trials as a treatment for tuberous sclerosis, may exacerbate features of fragile X syndrome, another condition related to autism.

Common genetics may help forge social ties, a nonspeaking woman with autism hosts “The Late Show,” and the mix of bacteria in the gut may relate to brain structure.

Male mice with a genetic variant tied to autism may have learning difficulties that females with the variant do not.