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IUD not seen on ultrasound — DFSRH MCQ

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HardIntrauterine contraceptionIUD not seen on ultrasoundDFSRH

A 32-year-old woman has missing IUD threads. Pregnancy test is negative and ultrasound shows no intrauterine device in the uterus. What is the most appropriate investigation?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: B — Abdominal and pelvic imaging to locate the device

If an IUD is not seen in the uterus, expulsion and perforation must be distinguished. Abdominal or pelvic imaging can identify an extrauterine device. Assuming expulsion may miss perforation.

Reference: FSRH Intrauterine Contraception Guideline 2023; UKMEC 2025; BNF