“…Radiography allows assessing hip position with specific measures, such as the acetabular index (28–50° before surgery) and the center‐edge angle (Asif, Umer, Beg, & Umar, ; Aydin, Yilmaz, Senaran, & Durgut, ; Rocha, Nishimori, Figueiredo, Grimm, & Cunha, ; Szoke, Staheli, Jaffe, & Hall, ). Using ultrasound to assess initial hip position, Binkiewicz‐Glinska et al () reported a good seating of the femoral head of the acetabulum and using Graf's classification, Aydin et al () noticed that all hips were classified as type IV (i.e., dislocated). Initial ROM of the hip varied; flexion (40–140°), extension (−70–15°), abduction (5–65°), adduction (−5–50°), internal rotation (−20–60°), and external rotation (5–90°) (Aydin et al, ; Azbell & Dannemiller, ; Bohm et al, ; Kroksmark et al, ).…”