Answer
Benign ovarian cysts are estimated from clinical trial data to occur in 7% of Mirena levonorgestrel intrauterine system users, although their frequency depends on the diagnostic method used.
Sources for this answer
- Mirena 20 micrograms/24 hours intrauterine delivery systemBayer plc · emc · SmPC §4.8 Undesirable effects · Version 36Document updated
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