ABSTRACT The World Health Organization (WHO) has defined infertility as a failure to conceive over 12 months of exposure which is a good practical guide to management, and leaves a longer term residual incidence of infertility of 10–15%. Epidemiological data suggest that approximately 80 million people worldwide are infertile. WHO indicates the highest incidence in some regions of Central Africa where the infertility rate may reach 50%, compared to 20% in the Eastern Mediterranean region, a...