If you are worried about pregnancy but don’t want to take the pill, you can consider placing the IUD in the uterus. After the IUD is placed, the IUD can compress the endometrium and damage the endometrium, resulting in local inflammation of the endometrium, which is not conducive to sperm activity and fertilized egg transport, and the foreign body reaction caused by the IUD can also cause the endometrium to develop out of sync with the fertilized egg, thus interfering with fertilization.