A sudden pregnancy after more than ten years of having an IUD will require an ultrasound to see if the ring is still in place. If the ring has come off, you can decide whether to continue the pregnancy if you wish. If the ring is still in the uterine cavity, it is recommended not to continue the pregnancy. Sudden pregnancy after having the ring for more than ten years may be caused by the ring falling off, the ring moving out of place, or the ring having expired, resulting in contraceptive failure. If the ring has fallen off, the sudden pregnancy will not have any effect on the fetus, and the pregnant woman can decide whether or not to continue the pregnancy according to her own situation, and if she wants to continue the pregnancy, she should pay attention to regular obstetric examinations. If you do not want to continue the pregnancy, you can have an abortion. If the ring is displaced or expired, because the ring still exists in the uterine cavity, it will have an effect on the development of the fetus, which may lead to fetal deformities, so it is not recommended to continue the pregnancy, and you need to go to a regular hospital for abortion and removal of the ring.