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.
Chlamydia trachomatis is a gram negative organism, meaning that when stained in a laboratory, it will appear pink under a microscope. This bacteria is associated with causing the disease Chlamydia. An infection from this organism is usually spread through sexual intercourse.