It is really difficult to provide concentric reduction of the hip joint while decreasing the complications to minimum in the treatment of developmental dysplasia of the hip (DDH) in children, over six months. In the treatment of children at 6–18 months of age with DDH, it is aimed to perform hip joint reduction with closed or open reduction due to the reason that secondary pathologies (acetabuloplasty, proximal femur pathologies etc.) have a low incidence especially until one year. Decision for orthesis, traction, closed reduction and open reduction are generally given according to the patients` age. In the last few years, it has been focused on reducing iatrogenic femur head osteonecrosis, which directly affects the results of DDH treatments in the long term. The incidence of femur head osteonecrosis has been reduced by preventing the immobilization of the hip at extensive abduction and by using femur-shortening osteotomies when appropriate. In this review we present an evaluation of traction, and closed or open reduction methods which are used in the developmental hip dysplasia of the children between 6–18 months.