Removal lessens the chance of serious infections during pregnancy that can be life threatening in rare cases. Removal also reduces chances of miscarriage or premature delivery. However, in some cases removal may not be possible, or the removal may trigger a miscarriage. But ectopic pregnancy occurs less frequently for IUD users than it does for women who use no method. However, in the rare case when an IUD fails, there is a greater chance that the pregnancy will be in the tube.
Ectopic pregnancies are life threatening.
They usually are eliminated medically or removed with surgery. Infection of the fallopian tubes happens more often in IUD users than non-users. But the risk of infection is greater only for women who have more than one sex partner, or whose partner has other partners. They take a new partner. They change partners.