We did not diagnose any conditions with complete penetrance for ASD and found no cases of fragile X syndrome, but results from microarray analysis suggested a diagnosis in four children (XXY, 15q11.2 del, 1q21.1–q21.2 duplication, duplication at 2p16.3 involving NRXN1). This evidence concerns the gene NRXN1 and fragile X syndrome.