Selection of IUD The IUD is a very safe and effective contraceptive measure that can achieve long-term contraception and is very popular among female friends. However, many female friends often feel confused about the choice of IUD. Below, we will introduce to you from four aspects what kind of IUD is the best and safest. In terms of materials, the first thing to pay attention to is the material of the IUD. Currently on the market there are copper, white