Can a hormonal IUS get lost?
The IUS is well protected in the uterus and adapted to the shape of the uterine cavity. Very rarely, an IUS may slip or be ejected. (But the risk is lower than with copper IUDs.) In about 3%-6% of cases, the IUS is expelled, and this generally happens in the first months after insertion and frequently without the woman noticing anything. Without the hormonal IUS, however, there is no protection against pregnancy! Therefore, you should occasionally check the position of the IUS, either by touching the thread in front of the cervix or via regular gynaecological check-ups using ultrasound. (see also “Frequency of check-ups”)