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Hormonal intrauterine device (LNG-IUD )

The hormonal intrauterine device (LNG-IUD) is a small, T-shaped plastic device, which contains the hormone progestogen. The device is placed into the womb through the vagina by a specially trained doctor or nurse in a short procedure in the clinic. 

The hormonal coil is different to the copper bearing intrauterine device (Cu-IUD, or copper coil). It works by thickening the mucus around the cervix, which makes it harder for sperm to get through, and making the lining of the womb thinner so that a fertilised egg cannot implant. For most people, their periods will be much lighter with a hormonal coil, and may stop altogether. There are different types of hormonal coil with different doses that can last three, five, or eight years. The coil does not protect you against STIs and it is a good idea to have an STI screen before you have a coil fitted, to reduce the risk of infection. Order a home test kit here.  

For detailed information on intrauterine systems, please see the NHS website.