Previous reports
have shown that ASD patients with rare variants of the NRXN1 gene inherited the variants
from either normal fathers or normal mothers.3,7-9 This phenomenon is not uncommon in
ASD and ID because both disorders are known as having multifactorial inheritance involving
more than one gene and environmental factors. However, there are some limitations to our
study, in that we cannot exclude other causes as possibly connected. First, we did not look at