There is no such thing as the best IUD, as long as the IUD is placed in the uterus, it is the safe IUD and the best IUD. There are many types of IUDs, including O-ring, T-ring, V-ring, Gene’s ring, and Manuel’s ring. Which ring to place should be adapted to the woman’s specific situation, i.e. the best ring. The time to place the ring is usually 3-7 days after menstruation, and no intercourse should be allowed during this time. Some tests should be done at the hospital and the doctor will choose the right ring according to the size of the uterus and the size of the uterine cavity. If there are signs of menstrual pain and heavy menstruation, a ring with medicine can be placed, which is both contraceptive and curative. If you are breastfeeding, generally women with normal delivery can have the ring placed at 3 months, if you had a cesarean section, you should wait until 6 months or more before placing it, this time should also exclude pregnancy. If you have inflammation or irregular menstruation, loose uterine opening, fibroids, etc., these conditions are not very suitable for IUD, generally after IUD can rest for two days, there may be mild abdominal pain, a small amount of bleeding, this situation is normal, generally within a week, back to normal. However, if there is still a lot of bleeding and abdominal pain after the IUD, you should still go to the hospital for a review as soon as possible.