The difference between the imported ring and the ordinary ring at present is that the side effects are small, but the contraceptive period is short. Imported rings are not only able to prevent pregnancy, but also reduce the amount of menstrual bleeding, and even reduce the number of days of menstruation, which can reduce the risk of ectopic pregnancy, reduce pelvic infections, and also prevent and alleviate gynecological diseases, which in turn reduces the likelihood of hysterectomy occurring. Imported rings have a good effect on the improvement of hematocrit, iron balance, anemia correction, imported rings are more expensive, but the side effects are relatively small, and not easy to get rid of the ring, imported rings have a shorter life expectancy, 5 years to go to the hospital to check, need to be replaced. Ordinary ring can only play the effect of contraception, life compared to the imported ring is relatively long, there are 10 years, there are 20 years, the ordinary ring in the body is easy to deformation, to a certain time after the basic can not be recognized. Regardless of the ordinary ring or imported ring, in the half month after the ring prohibit coitus, do not eat spicy, cold food.