Reproductive tract infection (RTI) are infections that affect the reproductive tract, which is part of the Reproductive System. For females, reproductive tract infections can be in either the upper reproductive tract (fallopian tubes, ovary and uterus), and the lower reproductive tract (vagina, cervix and vulva); for males these infections are at the penis, testicles, urethra or the sperm tube. The three types of reproductive tract infections are endogenous infections, latrogenic infections and the more commonly known sexually transmitted infections. Each has its own specific causes and symptoms, either caused by a bacterium, virus, unsterilized medical tools or sexually. Some of these are easily treatable and can be cured, while others are more difficult.