Silent Migration for Three Decades, Intravesical and Sigmoid Colon Perforation by a Forgotten IUCD: A Rare Case Report.

IUCD migration can cause severe complications like bladder and sigmoid perforation, even decades post-insertion. Regular follow-up, timely imaging, and thorough patient education are critical for early detection and multidisciplinary management to prevent long-term adverse outcomes and ensure patient safety in reproductive health care.