Specifically, in the “schizophrenia-female” group, we observed a significantly higher incidence of the rs6265-T (V66M) variant in the BDNF gene (p = 0.0180, n = 47) and a lower occurrence of the rs1227051-A variant in the CDH23 gene (p = 0.0495, n = 47) compared to healthy volunteers. This evidence concerns the gene BDNF and schizophrenia.