PCRRFLP analysis was used to analyze single nucleotide polymorphisms of SLC30A1 (rs7526700, rs2278651, rs611386), SLC30A4 (rs2453531, rs8029246), SLC30A5 (rs351444, rs164393, rs6886492), SLC39A1 (rs10127484, rs11264736), and SLC39A3 (rs759071, rs4806874, rs10415622) in mothers of children with non-syndromic cleft lip with or without cleft palate (CL/P) and control mothers.