Pregnancy outcomes associated with extended use of the 52-mg 20 μg/day levonorgestrel-releasing intrauterine system beyond 60 months: A chart review of 776 women in Brazil

The 52-mg 20 μg/day LNG-IUD presented a very high contraceptive efficacy beyond the first 5 years of lifetime labeled. Increasing data support that efficacy beyond 5 years of use, and new data suggested efficacy as long as 15 years. Healthcare professionals, policy makers and stakeholders could take advantage of the present information to decide to maintain the same device at least up to seven years. Furthermore, amenorrhea could be a good indicator of contraceptive effect.