While the exact cause of autism spectrum disorders are currently unknown, there are many possibilities.

尽管孤独症谱系障碍的确切成因目前还不清楚，但是可能性有很多。

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Low birth weight tended to be more often linked to autism spectrum disorders in boys than girls (9.9 percent versus 3.3 percent).

低体重新生儿与自闭症之类的疾病的联系程度，男孩比女孩更高(9.9%对3.3%)。

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Kim said children in regular American classrooms should be included in future studies to get a better measure of the incidence of autism spectrum disorders.

金说，美国课堂上的孩子们应该被包括在未来的研究中，以更好地评估自闭症谱系障碍发生率。

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Autism is a set of disorders, along a wide spectrum, that affects a person's ability to respond socially or form relationships.

VOA: standard.2010.08.09

Older mothers are known to face increased risks for having children with genetic disorders, and genes are thought to play a role in the entire autism spectrum.

VOA: standard.2010.02.10

Biochemical aspects in autism spectrum disorders: updating the opioid-excess theory and presenting new opportunities for biomedical intervention.

FORBES: Anti-Vaccine Activists Apparently Immune To Science

The ScanBrit randomised, controlled, single-blind study of a gluten- and casein-free dietary intervention for children with autism spectrum disorders.

FORBES: Anti-Vaccine Activists Apparently Immune To Science

While many studies have concluded that vaccines do not cause autism spectrum disorders, researchers are still looking for the causes.

CNN: Vaccine-autism question divides parents, scientists