Levonorgestrel intrauterine system versus dienogest effect on quality of life of women with deep endometriosis: a randomized open-label clinical trial.

Women with deep infiltrating endometriosis (DIE) can benefit from the use of progestins. Our aim is to explore if levonorgestrel-releasing intrauterine system (LNG-IUS) non inferior to dienogest (DNG) in improving deep endometriosis women's quality of life (QoL). This randomized open-label clinical trial included forty women with DIE assessed using clinical history and physical examination, transvaginal ultrasonography and magnetic resonance of the pelvis without any previous surgical treatment, with two treatments arms.