The increasing need for support and the fragmented nature of the service system challenge us to develop services for children and their families. Child and family services are provided by the public, private and third sectors, which according to research have little or no reciprocal co-operation. The review produced information on co-operation interventions used by service providers in the field of health care, social care and education. The current evidence base is too heterogeneous and sparse to draw conclusions on the overall effectiveness of interventions to co-operation. Further high quality studies examining the effectiveness of co-operation interventions are required.