title: Two low-dose levonorgestrel intrauterine contraceptive systems: a randomized controlled trial.
authors.affiliation: Department of Obstetrics & Gynecology, School of Medicine, University of Campinas (UNICAMP), Campinas, Brazil.
authors.forename: Luis
authors.initials: L
authors.lastname: Bahamondes
mesh_terms: D005260:Female; D006801:Humans; D007436:Intrauterine Devices, Medicated / Q000009:adverse effects*; D016912:Levonorgestrel / Q000008:administration & dosage*; D011247:Pregnancy; D018873:Pregnancy Rate
chemical_list: D016912:Levonorgestrel