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, caused by the bacterium Chlamydia trachomatis, is the most common sexually-transmitted bacterial infection in the UK, particularly amongst sexually active men and women aged 16-24 years. In the majority of cases, the disease is asymptomatic in both men and women.