A former birth control pill user decided to switch to an IUD as a form of birth control after reading about potential dangers associated with the pill.
Her physician inserted an IUD and instructed her on its use. She experienced some bleeding and cramping after insertion. Two years later she developed more severe cramping and a non-specific vaginal infection. Her physician was unable to determine the cause of the infection. When the IUD was finally removed the surgeon found that the infection had spread to her fallopian tubes necessitating their removal. (Shortly afterwards the manufacturer of the IUD revealed that the IUD was known to cause non-specific vaginal infections which did not respond to conservative treatment.)