The issue of integrating MCH/FP and STD/HIV services has gained an increasingly high priority on public health agendas in recent years. In the prevailing climate of health sector reform, policy-makers are likely to be increasingly pressed to address the broader concept of "reproductive health' in the terms consolidated at the Cairo International Conference on Population and Development, and the UN Conference on Women in Beijing. Integrated MCH/FP and STD/HIV services could be regarded as a significant step towards providing integrated reproductive health services, but clarity of issues and concerns is essential. A number of rationales have emerged which argue for the integration of these services, and many concerns have been voiced. There is little consensus, however, on the definition of "integrated services' and there are few documented case studies which might clarify the issues. This paper reviews the context in which rationales for "integrated services' emerged, the issues of concern and the case studies available. It concludes by suggesting future directions for research, noting in particular the need for country-specific and multi-dimensional frameworks and the appropriateness of a policy analysis approach.