It should not lose effectiveness for at least 5years but it can slide out of position and cause problems. If it was already not quite sitting right you might want to have it checked again. they can also become embedded in the uterine wall over time although I've never heard that lessens effectiveness just makes it harder to remove. Personally I'd request an ultrasound if your insurance will cover it. A physical exam only goes so far and then they could also check for pregnancy.



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