期刊
CONTRACEPTION
卷 101, 期 3, 页码 159-161出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.contraception.2019.10.010
关键词
Levonorgestrel; Intrauterine system; Liletta; Efficacy; Safety
资金
- Medicines360
Objective: To assess 6-year contraceptive efficacy and safety of a levonorgestrel 52 mg intrauterine system (IUS). Study Design: We assessed pregnancy rates through 72 months in women aged 16-35 years at enrollment and safety in all participants (aged 16-45 years, n = 1751) in an ongoing 10-year phase-3 trial. Results: Over six years, nine pregnancies occurred (none in year 6) for a life-table pregnancy rate of 0.87 (95% CI 0.44-1.70). Adverse event rates remain low through 6 or more years of use. Two expulsions occurred in year 6. Conclusion: This levonorgestrel 52 mg IUS is a highly effective and safe contraceptive over 6 years of use. (C) 2019 Elsevier Inc. All rights reserved.
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