In Northern Ireland the Health Visitor assessment at 6 months was demonstrated to be successful in detecting the majority of cases of DDH and was maintained, although moved to 4 months. There has been increased numbers of referrals resulting in prolonged waiting times for low risk infants. Methods. A retrospective review was performed of the records of all children treated for DDH in the three-year birth cohort from 2008 to 2010. Data was obtained by collating the records of the nurse led clinics, inpatient records and theatre logs from the three treating centres. Results. 584 children were treated, 87% female. Treatment rate was 7.7/1,000 live births (2003 = 5.2). Twenty-three cases were diagnosed later than 1 year of age, 0.3/1,000 (2003 = 0.6); 146 cases were diagnosed later than 6 months 1.9/1000 (2003=1.7) of these 62 required operative treatment, 0.8/1,000 (2003 =1.1). The median age at referral was 7 weeks and ranged from 0 to 119 weeks. The median delay to be seen was 29 days with a highly skewed distribution, which ranged from 0 to 39 weeks. We found if waiting times had been capped at 9 weeks, as has been the case for other orthopaedic conditions, 52 patients who were seen after 6 months would have been seen on average 140 days earlier. Conclusions. Maintaining the health visitor assessment has allowed us to continue to reduce the number of children diagnosed with DDH after the onset of walking. However, delays in the referral pathways have prevented us from improving earlier treatment rates for younger infants and have introduced an undue delay in the treatment of a cohort of low risk infants