Low birth weight is not a risk factor for ASD. Advanced paternal age, maternal infection during pregnancy, and exposure to certain chemicals are all risk factors for ASD.

Fragile X syndrome is the most common genetic cause of ASD. It is caused by a mutation in the FMR1 gene, which is located on the X chromosome.

Air pollution, pesticides, and heavy metals have all been linked to an increased risk of ASD.

The estimated prevalence of ASD in the United States is 1 in 59 children.

Hyperactivity and impulsivity are not core symptoms of ASD. Impairments in social communication and interaction, restricted and repetitive patterns of behavior, and intellectual disability are all core symptoms of ASD.

The average age of diagnosis for ASD is 4 years old.

Medication is not a treatment for ASD. ABA, speech therapy, and occupational therapy are all treatments for ASD.

The prognosis for individuals with ASD varies widely. Some individuals with ASD will live independently as adults, while others will require lifelong support.

Maternal use of folic acid during pregnancy is not a risk factor for ASD. Advanced maternal age, maternal infection during pregnancy, and maternal use of alcohol during pregnancy are all risk factors for ASD in mothers.

Paternal use of folic acid during conception is not a risk factor for ASD. Advanced paternal age, paternal infection during conception, and paternal use of alcohol during conception are all risk factors for ASD in fathers.

Normal language development is not a characteristic of ASD. Difficulty with social interaction, repetitive behaviors, and intellectual disability are all characteristics of ASD.

Physical therapy is not a treatment for ASD. Speech therapy, occupational therapy, and medication are all treatments for ASD.

Normal birth weight is not a risk factor for ASD in children. Premature birth, low birth weight, and multiple births are all risk factors for ASD in children.

Normal sensory processing is not a characteristic of ASD. Difficulty with social interaction, repetitive behaviors, and intellectual disability are all characteristics of ASD.

Vitamin therapy is not a treatment for ASD. ABA, speech therapy, and occupational therapy are all treatments for ASD.