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-Cause. Chlamydia infection is caused by the bacterium Chlamydia trachomatis. It is spread through vaginal, anal, or oral sex with an infected partner. A pregnant woman may spread the infection to her newborn during delivery.You can spread chlamydia even if you do not have symptoms of infection.hlamydia infection is caused by the bacterium Chlamydia trachomatis. It is spread through vaginal, anal, or oral sex with an infected partner.