A study set out to investigate the factors affecting the prevalence of the practice among cross-border communities in East Africa and the Horn of Africa and the extent to which people cross borders to practise or undergo FGM and the effects of the practice on the women and girls in those communities. Changes were found in social norms in the cross-border communities investigated, indicating that the practice of female genital mutilation (FGM) can be eradicated. Effective interventions to end FGM need to be tailored to communities’ belief systems if they are to be “owned” by and mobilize the communities to change their culture. This report summarises the findings.