Sexually transmitted diseases (STDs) indicates many types of clinical syndromes and infections caused by pathogens that can be acquired and passed by sexual contact. The current study which was conducted at privet clinics of Gynecology obstetrics doctors mainly, and at Al Kut hospital in Wasit Province. The samples of the current study consist of blood samples, urine sample from each patient. 100 patients with history of abortion. Urine samples were kept for later DNA extraction. Blood samples were analysed for the detection of Chlamydia trichomatis antibody. The results of the Chlamydia trichomatis antibody were positive in 7% in women with abortion. PCR results were more specific and accurate for the detection of the antigen DNA, 17% Chlamydia trichomatis.