Autism is characterized by high birth weight, which one might expect if autism were caused by an overly paternally influenced brain, given the link between imprinting and growth-regulating genes.

• 孤独症表现出高出生体重的特点，鉴于印迹与生长调节基因间的关联，由此可推测孤独症是否因其过度受父方影响的大脑而引起。