There is a considerable cost differential between copper intrauterine devices (IUDs) and the levonorgestrel-releasing intrauterine system (LNG IUS) in the UK. Most contraceptive services face financial stringency and it is increasingly important to deliver cost-effective care whilst still offering patient choice. Although all long-acting reversible methods of contraception are cost effective,1 the cheapest copper IUD costs around £10 and lasts for 10 years, in contrast to an IUS that costs around £80 and lasts 5 years. Both are usually offered to all women but there could be significant cost savings to the National Health Service if more women used …