We present a review of 195 patients attending hip ultrasound clinic from June 2005–2006 to assess for hip dysplasia. 51 dysplastic hips were identified and if appropriate were treated with a Pavlik harness. Follow up was continued until ultrasound was normal. However three cases (7%) were found to be dysplastic on further follow up. Whilst this study does not prove the existence of ‘late’ dysplasia occurring in hips that were normal at birth, it does show that hips treated to normality in the first six months of life can develop recurrent dysplasia. It suggests that weaning from Pavlik harness maybe appropriate and highlights the need for long term follow up for dysplastic hips with pelvic x-ray at 5 months.