New research has raised concerns that women using a contraceptive coil might face a slightly increased risk of breast cancer. The study highlighted an "unexpected" link between the use of an intrauterine system (IUS), also known as a hormonal coil, and a higher incidence of the disease in women aged 15 to 49. It was found that there were 14 additional cases of breast cancer for every 10,000 women who used a levonorgestrel-releasing intrauterine system (LNG-IUS) over five years, compared to