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.
The symptoms of chlamydia depend on the site of infection. It is transmitted through infected secretions, and mainly infects mucosal membranes, particularly the cervix, rectum, urethra, throat and conjunctiva (eyes). Trachoma, one of the primary causes of blindness is due to infection by Chlamydia trachomatis.