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 bacteria, which is found in the semen and vaginal fluids of men and women who have the infection.Chlamydia is easily passed from one person to another through sexual contact. Anyone who is sexually active can get it and pass it on. You donât need to have lots of sexual partners. In women, chlamydia can spread to other reproductive organs causing pelvic inflammatory disease (PID). 2  This can lead to long-term pelvic pain, blocked fallopian tubes, infertility and ectopic pregnancy (when the pregnancy develops outside the uterus, usually in a fallopian tube).