STDs are an important global health priority because of their devastating impact on women and infants and their inter-relationships with HIV/AIDS. STDs and HIV are linked by biological interactions and because both infections occur in the same populations. Infection with certain STDs can increase the risk of getting and transmitting HIV as well as alter the way the disease progresses. In addition, STDs can cause long-term health problems, particularly in women and infants. Some of the health complications that arise from STDs include pelvic inflammatory disease, infertility, tubal or ectopic pregnancy, cervical cancer, and perinatal or congenital infections in infants born to infected mothers.