4. Discussion
Infertility is a prevalent condition that has profound socio-economic and health consequences on both the individual and society. Despite the important consequences of infertility, estimations of its prevalence are limited. The reported prevalence of infertility ranges between 3.5%-22% in different countries, due possibly to the recruitment process of the study population, infertility definitions and method of estimation (Larsen, 2005). Furthermore, advances in the diagnosis, treatment and prevention of infertility in the past decades have led to considerable changes in the worldwide prevalence of infertility.