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Days 272–365
Weighted percentage of levonorgestrel intrauterine system users who experienced amenorrhea, defined as the proportion of users who reported complete cessation of bleeding or spotting for at least 90 days among total users with completed menstrual bleeding diaries, for the fourth interval after insertion.
CI, confidence interval; Pct, percentage.
Sergison and Maldonado. Amenorrhea associated with LNG-IUS use. Am J Obstet Gynecol 2019.
