According to relevant statistics, more than 85% of young women of childbearing age place birth control rings for contraception. However, the pregnancy rate of ring-off and ring-bearing is also higher, reaching more than 14%. Therefore, how to prevent the birth control ring from falling off is a very important issue. According to statistics, more than 73% of birth control rings fall off in the first year after the ring is put on, and more than 40% of them fall off in the first three months. There are several reasons for the birth control ring to fall off:

       1. The first time the ring is put on, the uterus is for birth control

　　The ring is sensitive to contraction and will expel the ring.

　　 2. The operator is not skilled, and the ring is not placed at the bottom of the palace.

　　3. The conditions of the recipient are not suitable for ring placement, such as loose uterine mouth, severe cervical erosion, uterine deformities, such as mediastinal uterus, bicornuate uterus, unicornuate uterus, etc., are easy to lose the ring and become pregnant with ring.

　　Four. It is related to the material, weight, shape, model size, texture and other factors of the birth control ring. For example, a metal single ring is easier to fall off than a plastic ring with a plastic bracket in the center or a mixed ring and a uterine ring; the model of the ring will stimulate the uterus to contract and cause the birth control ring to move down and fall off. On the contrary, the model of the ring is too small. Easy to get pregnant or fall off with the ring.

　　 5. Those who put the ring during lactation. After stopping breastfeeding, the uterus returns to its original shape, and the birth control ring is relatively small, which can easily cause shedding or pregnancy.

　　 Six, ectopic birth control ring. The contraceptive ring deviates from the uterine cavity, is inserted into the myometrium or enters the abdominal cavity, losing its function and causing contraception failure.

　　 In addition, excessive menstrual flow and heavy work during menstruation can also cause the birth control ring to fall off.

　　The most important way to prevent the birth control ring from falling off is to check regularly, once a month, three months, and half a year after the ring is placed. Check again every six months, and check the position of the birth control ring in the uterine cavity through B-ultrasound, X-ray fluoroscopy or ring detector. For those who have had more than two lapses in the ring, it is best to use a uterine cavity measuring instrument to carefully measure the depth and width of the uterine cavity, and then select a more suitable model or type. Experience has shown that if the placement of a single metal ring fails (referring to shedding and conception) 1 to 2 times, the failure rate can be significantly reduced by replacing the uterine contraceptive ring or the T-shaped contraceptive ring with copper wire.