 Pelvic inflammatory disease or pelvic inflammatory disorder PID is an infection of the upper part of the female reproductive system namely the uterus, fallopian tubes, or the ovaries. Often there may be no symptoms. Signs and symptoms, when present may include lower abdominal pain, vaginal discharge, fever, burning with urination, pain with sex, or irregular menstruation. Untreated PID can result in long term complications including infertility, ectopic pregnancy, chronic pelvic pain, and cancer. 