Pelvic inflammatory disease.

Pelvic inflammatory disease (PID) is an infection of the female reproductive organs (upper genital tract and the surrounding structures including the endometrium, ovaries, and fallopian tubes) [1]. PID occurs when bacteria move from the vagina and cervix upward into the uterus, ovaries, or fallopian tubes. The bacteria can lead to an abscess in a fallopian tube or ovary. Long-term problems can occur if PID is not treated promptly [1, 2].