ABSTRACT
Is to detect Chlamydia Trachomatis organism in cervical swabs obtained from patients with unexplained infertility [UI] and to compare its incidence in infertile compared to fertile females in reproductive age. The study design was a case control observational study, done in Cairo University Hospitals. One hundred females diagnosed as unexplained infertility and 100 normal fertile females were included in the study for detection of Chlamydia trachomatis by using polymerase chain reaction [PCR] of cervical swab samples. Fifteen females were positive for Chlamydia trachomatis in infertile group while only 2were positive in healthy fertile group with p value of 0.002. The Incidence of Chlamydia trachomatis in cervical swabs was significantly higher in unexplained infertile females compared with the control group