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.
Chlamydial (kla-MID-ee-al) infections are caused by three species of microorganisms. Chlamydia trachomatis can cause eye or lung infections and can also infect the urinary and genital areas of both men and women. Chlamydia pneumoniae causes infections of the respiratory tract, and Chlamydia psittaci causes an illness, known as parrot fever, that is similar to the flu.
) is a common curable bacterial sexually transmitted disease (STD). Chlamydia trachomatis, or simply chlamydia, is an infection caused by pathogen bacterium that can afflict the cervix in women and the urethra and rectum in both men and women.Occasionally other parts of the body (lining of the eyelid, throat and rectum) can be affected.hlamydia is transmitted primarily through sexual activity. The following are the most common ways: 1  unprotected intercourse (vaginal, anal) with an infected partner. 2  oral sex, although a less common cause of infection as bacteria Chlamydia trachomatis targets the genital area rather than the throat.