Menstruation, periodic discharge from the vagina of blood, secretions, and disintegrating mucous membrane that had lined the uterus. 1  The biological significance of the process in humans can best be explained by reference to the reproductive function in other mammals.
Chlamydia is a common sexually transmitted disease (STD) caused by infection with Chlamydia trachomatis. It can cause cervicitis in women and urethritis and proctitis in both men and women.
Chlamydial Genitourinary Infections - Background. 1  Chlamydial infection can cause disease in many organ systems, including the genitourinary tract. 2  C trachomatis can be differentiated into 18 serovars (serologically variant strains) on the basis of monoclonal antibodyâbased typing assays.