Advantages and Disadvantages of IUD IUD is a common contraceptive method, which has its own advantages and disadvantages. First of all, the ring is more convenient than oral contraceptive pills because the ring only needs to be installed once and can be used for a long time. In addition, the contraceptive effect of the IUD is very high, almost reaching over 99%, which allows women to have sexual intercourse with more peace of mind. However, there are some disadvantages to the upper ring. Because the upper ring is a kind of avoidance in the body,