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 is a bacterial infection caused by caused by Chlamydia trachomatis. The infection can spread through the genital tract from various types of sexual contact. About 1.8 million people in the United States have chlamydia, according to the latest estimates from the U.S. Centers for Disease Control (CDC).