For families with one child with Autism, there seems to be higher risk of psychiatric disorders. The reverse is also likely true - if one child has schizophrenia, there is higher risk of other psychiatric disorders in other children.
If you have one family member with schizophrenia - be sure to read the “Preventing Schizophrenia” (and other psychiatric disorders) section of our website:
CONCLUSIONS AND RELEVANCE:
Psychiatric and neurodevelopmental disorders cluster among siblings of probands with ASD. For etiologic research, these findings provide further evidence that several psychiatric and neurodevelopmental disorders have common risk factors.
Source: