The levels of four chemicals in the brain may distinguish autism and vary with its severity, according to a new study.

Doctors can now order a blood test that its makers say may help flag autism, but experts say the test is not appropriate for use in clinics.

A new study suggests that its results could lead to a simple test for autism, but statisticians say the test could not be used to screen for the condition in the general population.

David and Bernardo Sabatini, brothers born just a year and a half year apart, invent their way to answering big questions about autism.

Cooperative problem-solving may have kept human brains small, researchers puzzle over new European online privacy rules, and Canadian officials counter unfounded claims of a cure for autism.

A mutation that prevents some amino acids, the building blocks of proteins, from entering the brain may lead to autism.

Neural stem cells derived from boys with autism of unknown cause may share genetic, chemical and physical features absent in cells from their typical brothers.

Metformin can reverse weight gain in children with autism who take antipsychotic medications.