BACKGROUND: In modern gynecology an intrauterine device (IUD) with levonorgestrel is often used as a method of contraception. The levonorgestrel-releasing intrauterine system is small and T-shaped. In Slovenia, only a gynecologist may insert it. CASES: We present 2 clinical cases in which, despite strong evidence that no perforation had occurred during insertion, the IUD was found outside the uterus. If the IUD threads are not visible or the IUD cannot be located in the uterine cavity, an X-ray of the abdomen must be performed. If the IUD is found in the abdominal cavity outside the uterus, removal by laparoscopy is carried out. CONCLUSION: Given the large number of inserted IUDs, the complications associated with the levonorgestrel-releasing intrauterine system are quite rare, and therefore it remains one of the most widely used contraceptive methods. (J Reprod Med 2017;62: 215-217)