Researchers in the CPEA Network and their colleagues around the world have learned a lot about autism through genetic studies, but they stil...

Scientists generally use a combination of methods to find candidate genes likely to be involved in autism.

In 1999, NICHD-supported scientists discovered that most girls with Rett syndrome have a change in the pattern of a single gene the Methyl-C...

Scientists don't know exactly what causes autism at this time. Much evidence supports the idea that genetic factors?that is, genes, their fu...

The body makes many chemicals that help it function correctly. When these chemicals are missing or incorrect, the body may have problems fun...

In about five percent of autism cases, another disorder is also present. Studying this kind of co­occurrence helps researchers who are t...

Researchers and health care providers use the term neural tube defects to describe one important category of birth defects.

We don't know the exact cause of endometriosis. Right now, a number of theories try to explain the disease.

Identical twins occur when a single fertilized egg splits into two.

Birth defects can be caused by different factors, such as: