What is a common characteristic of most IUDs?

Most intrauterine devices (IUDs) are designed to provide reliable contraceptive protection for several years, which is a significant advantage for users seeking long-term solutions to prevent pregnancy. Depending on the type of IUD, they can remain effective for 3 to 10 years. The hormonal IUD releases small amounts of progestin, while the copper IUD works primarily through a non-hormonal mechanism by creating an environment that is toxic to sperm.

Regarding the other aspects that were mentioned, IUDs do not need to be replaced every month, making them more convenient than other forms of contraception like the pill. They also require a prescription, as a healthcare provider needs to insert them. Notably, IUDs can be made of materials beyond synthetic hormones; for example, copper is used in the non-hormonal variety. This variety ensures that IUDs are flexible in terms of user needs and preferences while still maintaining their primary function of providing effective contraception over an extended period.