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 Std Chlamydia. Definition: Chlamydia is a sexually transmitted disease caused by the bacteria Chlamydia trachomatis. The family of Chlamydia viruses has three members that normally affect human beings, but only C. trachomatis produces genital infections.his particular bacterial std disease can cause inflammation of the urethra, cervix, fallopian tubes, rectum or pharnyx (throat) in women, and urethra, prostate, rectum and pharnyx in men.