Abstract
OBJECTIVE: The objective was to assess whether patient-perceived pain during the insertion of the levonorgestrel-releasing intrauterine system (LNG-IUS) depends on the timing during the menstrual cycle. DESIGN: A stratified two-armed non-inferiority randomised controlled trial. SETTING: Large teaching hospital in Veldhoven, the Netherlands. SAMPLE: From October 2013 to May 2014, 60
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