It was first discovered in 1976 that the copper IUD could be used as a form of emergency contraception, due to the fact that sperm doesn’t like copper — it changes the way sperm cells move so they can’t swim to an egg. And if sperm can’t make it to an egg, pregnancy can’t happen. This intrauterine device with copper is used within five days of unprotected sex. Plus, it is typically placed in the uterus, and may be used by women of all ages regardless of whether or not they have had children. It is worth noting that most copper devices consist of a plastic core that is wrapped in a copper wire. Besides, many of the devices have a T-shape, although there are also "frameless" copper IUDs available around the world. As a matter of fact, this device happens to be one of the most effective forms of birth control available. And one of the awesome things about it is that it lasts for years, but is not permanent. So, if you decide that you want to get pregnant, or if you just don’t want to have your IUD anymore, your nurse or doctor can take it out. After your get your IUD removed, your fertility goes back to normal. As for the side effects of the copper IUD, they include pain when the device is placed and cramping or back aches for a few days after. They can also include spotting between periods, irregular periods, not to mention that a woman’s periods can be longer or heavier.