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.
Chlamydia. Chlamydia is a common sexually transmitted disease (STD) caused by the bacterium, Chlamydia trachomatis, which can harm a woman's reproductive organs. Even though symptoms of chlamydia are usually mild or absent, it can cause serious complications like infertility.Some women may not even know they have chlamydia.hlamydia is a common sexually transmitted disease (STD) caused by the bacterium, Chlamydia trachomatis, which can harm a woman's reproductive organs. Even though symptoms of chlamydia are usually mild or absent, it can cause serious complications like infertility. Some women may not even know they have chlamydia.