Bilateral hip US done at follow-up in the standard coronal and axial planes. The right hip is normal, (improved compared to previous). Femoral head 50% covered by acetabulum (alpha angle 59 degrees). Dynamic imaging of right hip shows no evidence of ligamentous laxity. Left hip is approx 40% covered by acetabulum (alpha angle 51 degrees). Left hip does show ligamentous laxity on stress imaging. The impression was persistent ddh of left hip with 40% coverage and a 51 degree alpha angle.