Intrauterine contraceptive device (IUCD) is a common birth control method. It is safe but can be associated with serious complications including migration into the peritoneal cavity and penetration into other intra-abdominal and pelvic viscera; most commonly the rectosigmoid colon. Different retrieval methods including endoscopy, laparoscopy or open abdominal surgery have been described. We report the case of 38-year-old woman who became pregnant shortly after insertion of the IUCD 6 years prior to presentation. She delivered vaginally and 'expulsion' of the device was assumed. Some 4 years later, she had another IUCD inserted and remained asymptomatic till she recently presented with iron-deficiency anaemia. As part of the investigation, diagnostic colonoscopy was performed. Surprisingly, the old IUCD was found penetrating into the midrectum. Uneventful endoscopic removal was performed and she remained well at 3-month follow-up. Migrating IUCD remains asymptomatic and may be discovered accidentally during routine investigation for some other symptoms.