The m-ring looks like a “cloverleaf” and is also known as the Maternally Pleasurable Birth Control Ring (MLBCR). There are many types of birth control rings, and the ones commonly used in China include the metal single ring, twisted ring, mixed ring, m-ring, T-ring, etc. The m-ring is a type of birth control ring that looks like a cloverleaf. The m-ring is a kind of contraceptive birth control ring, which is shaped like a cloverleaf, where one of the leaves is directed towards the cervical opening, while the remaining two leaves will be placed in the direction of the fallopian tubes on both sides, thus providing a contraceptive effect. Doctors will choose the right IUD according to the location and size of the uterine cavity to provide contraception. Some women experience side effects such as lower back pain and irregular menstruation after placing the IUD, so the IUD should be chosen under the guidance of a doctor, and if you feel unwell, you can consult a gynecologist at any time.