The purpose of this study was to investigate prospectively the effects of swaddling and consanguineous marriage on developmental dysplasia of the hip and associated risk factors. We screened by ultrasound 265 infants using the Graf method. The Pediatrics Department referred all newborn infants with suspected instability or a recognized risk factor to the orthopedic clinic. Risk factors of developmental dysplasia of the hip were searched and noted in these patients. Swaddling and consanguineous marriage were also determined and noted. We observed 164 of 265 infants (61.9 %) who had been swaddled and that 64 of 265 infants' parents were in a consanguineous marriage (24.2 %). In the statistical analysis that was conducted for swaddling and consanguineous marriage, highly significant differences were found. Our study showed that the rate of developmental dysplasia of the hip is very high, 11.7 %, in our region, eastern Turkey. Also, we commonly see improper swaddling and consanguineous marriage in our region, which affects many infants.