PID is a clinical syndrome that results from the ascension of microorganisms from the cervix and vagina to the upper genital tract. PID is a serious complication of chlamydia and gonorrhea, two of the most common reportable infectious diseases and sexually transmitted diseases (STDs) in the US.

Content source: Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention