Levonorgestrel release rates over 5 years with the Liletta® 52-mg intrauterine system

Liletta LNG content and release rates are comparable to published data for another LNG 52-mg IUS. The release rate at 5 years is more than double the published release rate at 3 years with an LNG 13.5-mg IUS, suggesting continued efficacy of Liletta beyond 5 years.