An Explorative Trial to Explore the Safety, Acceptability and Vaginal Bleeding Pattern of Three Etonogestrel-releasing Medicated Intrauterine Systems (Study P06060)

Inclusion Criteria: * Healthy female subjects in need for contraception will be selected to participate in the trial; * Each subject must be \>=18 to \<=40 years of age at screening and in need for contraception; * Each subject must have given birth to at least one child (gestational age \>=28 weeks); * Each subject must have a uterus with a measured length between 6.0 and 9.0 cm (extremes included) from external os to fundus uteri. Exclusion Criteria: * A subject must not be pregnant or suspected to be pregnant; * A subject must not have had an ectopic pregnancy in the past or must not have a history or presence of predisposing factors for this condition such as salpingitis, endometritis or pelvic peritonitis; * A subject must not have a history or presence of any malignancy; * A subject must not have a history or presence of premalignant disease of the uterus or cervix, including endometrial hyperplasia, or (other) sex-steroid sensitive premalignancies; * A subject must not have an active venous thromboembolic disorder (e.g. deep vein thrombosis, pulmonary embolism); * A subject must not have a history or presence of severe hepatic disease with AST and/or ALT levels of \>=3 times the upper normal limit; * A subject must not have congenital or acquired malformations or distortions of the uterus or cervix; * A subject must not have large or multiple uterine fibromyomata, or a smaller uterine fibromyoma which may interfere with the insertion of the MIUS/IUD according to the investigator; * A subject must not have vaginal bleeding of undiagnosed etiology; * A subject must not have dysmenorrhea interfering with daily activities or menorrhagia