43 congenitally dislocated hips of 27 children that were operated by using the Ferguson's procedure at Ankara Universıty, Faculty of Medicine. Department of Orthopaedic Surgery and TraumatologJ' between January 1979 and January 1988 and had a follow-up period of more than 2 years, were evaluated retrospectively. The average age at operation was 10.9 months and 741 percent of the patients were female. The average follow-up period was 75.4 months. The results were evaluated according to Severin s Radiographic Criteria 29 of 43 ( 67.4%) hips were considered to be Grade 1 or 11. Avascular necrosis of the femoral head was observed in 4 (9.3%) hips. 12 (27.9%) hips have already undergone or will undergo to subsequent surgery because of acetabular dysplasia or subluxation of the femoral head. The best radiographic results were obtained in the hips that were operated between 7-12 and 13-18 months of age, respectively. Preoperative conservative treatment didn't iı'1fluence the results.