Final answer:
Copper IUDs are used for long-term contraception, working by interfering with sperm movement and potentially preventing implantation, with a high effectiveness rate but some risk of complications.
Step-by-step explanation:
The clinical use of the Copper IUD relates to its role as a long-term, reversible method of contraception. The copper element in the IUD interferes with sperm mobility and egg fertilization and may prevent implantation of a fertilized egg. IUDs are T-shaped plastic structures inserted into the uterus, offering effectiveness with failure rates of less than one percent. However, they come with potential risks, such as increased menstrual bleeding and, in rare cases, uterine perforation. Once an IUD is removed, fertility returns to normal immediately. This makes IUDs a popular choice for those seeking effective and reversible birth control.