Developmental dysplasia of the hip (DDH) is an important problem in infancy, 100 infant randomly collected 75 infants had risk factors for DDH 27 infants had more than one risk factor and they were 57 boys and 43 girls below 1 year to detect the incidence of DDH.Clinical examination by Ortolani and Barlow testes was normal in all newborn infants but the other clinical tests showed leg length discrepancies and asymmetrical skin creases in 2 cases.Ultrasound examination of the hips using Graf's technique revealed that 2 cases had DDH. First case had bilateral DDH and second case had DDH on right side and small femoral head (1 cm), on left side absent femoral head, short femur and the acetabuler hypoplasia. The two cases that had DDH were females and had more than one risk factor for DDH:First case: Female with positive family history (her uncle had hip dislocation on left side) and oligohydramnios.Second case: Female, first pregnancy and congenital anomalies including small kidneys, small spleen and short deformed lower limbs.The results of sonographic examination revealed that all infants who hadn't risk factors for DDH (25 infants) had normal hip ultrasound (0%) and 2 out of 75 infants (2.6%) who had risk factors showed DDH, these 2 cases represent (2%) of all examined cases. Routine ultrasonographic screening of all infants who demonstrate abnormal clinical signs or who are at an increased risk for developmental dysplasia of the hip led to a high rate of detection of DDH.Diagnosis of DDH was made by clinical examination and ultrasound of the hips.In conclusion early diagnosis and treatment of DDH, leading to the exclusion of surgery as a method of treatment, shorter, less invasive course of treatment with more favorable results and fewer complications.