Dr Jennifer Gunter, September 10 2016
The Mirena intrauterine system (IUS), the IUD with the hormone levonorgestrel, is a highly effective method of contraception currently approved for five years. Some data suggests that it probably good for six years, but a new study tells us with a good degree of confidence that the Mirena is safe and effective for seven years.
The study was funded by UNDP/ UNFPA/WHO/World Bank Special Programme of Research and published in the journal Contraception.