Autism Spectrum Disorder has a Genetic Basis
GENES
ENVIRONMENT
Twin Studies 61-94% concordance rate among identical/monozygotic twins
10-17% concordance rate among dizygotic/fraternal twins
Family Studies Risk of developing autism is 10 times greater for siblings of autistic individuals than for general population, occurring 10-20% We consider the non-genetic factors to be in part environmental, that is the intrauterine environment: Medications (Valproic acid), maternal infection, challenging delivery, very low birth weight; may be differences in placental function, maternal stress, chemicals like pesticides
DiCicco-Bloom, Rutgers Robert Wood Johnson Medical School
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