The authors report a study of 157 cases of pregnancy occurring with an intrauterine device (IUD) in place. Particular attentions was paid to developments in patients who had accepted pregnancy (n : 67). The frequency of gravidic complications was much higher when the IUD was in place, and two septic abortions were seen between the fourth and sixth months of pregnancy. The authors put forward a new method of echo-guided removal of the device.