There are many different types of IUDs, and it is not possible to generalize which one is better, but the choice should be made according to the patient’s specific situation. Women who want to achieve the purpose of contraception through the contraceptive ring can choose to use the O-ring, T-ring and Y-ring, the O-ring can be used for a longer period of time, while the T-ring and Y-ring are easier to remove. Patients can choose a suitable birth control ring according to their own situation, but it should be noted that the choice of ring must be in line with the size of the uterine cavity can not be too large or too small, too large a model will lead to bleeding in the uterine cavity, and if you choose too small a model of the ring will lead to the ring easy to fall off. If you want to use a contraceptive ring to achieve a therapeutic effect, such as endometriosis, you can use the Mannuelle ring, which contains progesterone.