To determine the prevalence of Chlamydia trachomatis urogenital infection and to identify behavioral, demographic, and clinical factors associated with the infection in pregnant women’s. One-hundred-eleven patients 15-39 years old, at 10-16 weeks of gestation and attending the prenatal clinic at our hospital, were tested for Chlamydia trachomatis infection by using ELISA IgM to screen all the young women with PID, Infertility for Chlamydial infections.50 negative groups were included in the study.