Unexplained infertility refers to the absence of a definable cause for a couple's failure to achieve pregnancy after 12 months of attempting conception despite a thorough evaluation. Infertility is a common problem in all population groups, and for those who are affected it can become a major tragedy and can lead to significant psychological and physical disturbances. It is important to know about the prevalence of the various factors causing infertility. We assessed all patients attending infertility clinic during the period of study to exclude any patient having organic cause of infertility and select our patients for the study