The advantage of the IUD is that the operation is relatively simple and acceptable to both men and women, and it is a reversible method of contraception, so if you want to plan a pregnancy, you can take out the IUD three months in advance. Another advantage is that the contraceptive effect is good, in clinical practice, the contraceptive effect of the IUD can be as high as 99.6%. The birth control ring also has its disadvantages, not everyone can adapt to the birth control ring, individual on the birth control ring after irregular vaginal bleeding, bleeding symptoms can not be alleviated with medication, so this part of the population can not be on the birth control ring to give contraception, you can use other methods of contraception. Individuals may get pregnant even if the IUD is normal, and it may cause prolonged or shortened menstrual cycles.