Environment

Newborns with either above- or below-average levels of an immune-system marker, among other differences, have increased odds of being autistic.

Women who use marijuana while pregnant may be more likely to give birth to an autistic child. But investigators call for a cautious interpretation of the results.

Brothers and sisters of people with autism are both about two to three times more likely than the general population to have an autistic child themselves.

The relative contributions of genetic and environmental factors to autism have held steady over multiple decades, according to a large twin study.

High blood pressure during pregnancy may raise a woman’s chances of having an autistic child.

A study that followed 126 autistic people in England from their preteen years to age 23 found little improvement in their behavioral and emotional problems.

Society for Neuroscience members are demanding sharp cuts to the carbon footprint of its annual meeting.

Older men and women are more likely than young ones to have a child with autism, but this connection is not straightforward.

A child’s environment exerts a strong influence on the severity of her autism, a study of identical twins suggests.