ArticleContraception and reproductive medicine2025
Population characteristics of intrauterine device users in real-world clinical practice across Europe - insights from the EURAS-LCS12 study.
Article in Contraception and reproductive medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02146950 (European Active Surveillance Study of LCS12), which is not on this map. Not yet cited in PubMed.
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The trial behind it
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European Active Surveillance Study of LCS12
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Abstract
backgroundThe European Active Surveillance Study of LCS12 (EURAS-LCS12) investigates effectiveness and safety of intrauterine devices (IUDs) in routine clinical practice. Here, we aim to characterise the general population of IUD users across Europe recorded in a real-world setting.
methodsEURAS-LCS12 is a prospective, non-interventional cohort study in ten European countries, that started in 2014. All types of approved IUDs were enrolled: levonorgestrel (LNG)-IUS 8 (LNG release rate ~ 8 µg/day); LNG-IUS 12 (LNG release rate ~ 12 µg/day; LNG-IUS 20 (LNG release rate ~ 20 µg/day; ); copper IUDs and other hormonal IUDs (OHIUD). A great variety of baseline characteristics and endpoints are assessed in patient-reported questionnaires. The follow-up duration aligns with the intended maximum duration of use of 3 to 5 years, depending on the respective IUD.
resultsCurrently, 97,187 users are enrolled in the study, of whom the vast majority uses IUDs for contraceptive purposes (96.3%), and roughly two thirds are first-time IUD users (64.1%). Heavy menstrual bleeding (HMB) was reported as the second most common reason for IUD use but with apparent variations between devices and countries. Mean age of LNG-IUD 8 users was about 9 years lower compared with LNG-IUD 20 (26.2 vs. 34.6 years). Greatest differences in the proportion of gravid and parous women were observed between LNG-IUS 8 and OHIUD users (gravid: 38.6% vs. 89.8%; para: 30.6% vs. 88.0%).
conclusionsWith more than 97,000 IUD users, EURAS-LCS12 is one of the largest contemporary studies focusing on IUD usage and provides a substantial source of real-world data. IUD prescription patterns appear in line with assumptions that high-dose LNG-IUDs with longer approved durations of use are predominantly prescribed among older, gravid women, who may have completed their family planning, as opposed to younger nulligravidae. Overall, the study is a great source to depict which IUD type fits women with certain characteristics and needs at a certain time of life.
trial registrationNCT02146950.
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