MiCo - Mirena or Conventional Medical Treatment for Menorrhagia

Inclusion Criteria: * Women between the ages of 18-45 (inclusive) not intending to become pregnant during the next year * Women complaining of heavy menstrual bleeding over several consecutive cycles * Women without structural or histological abnormality of the uterus, or with fibroids less than 3 cm in diameter which are causing no distortion of the uterine cavity (eligible for pharmaceutical treatment according to the NICE guideline 2007) * Informed consent (where required by laws or regulations) Exclusion Criteria: * The contraindications and warnings of the respective Summary of Product Characteristics (Mirena®, combined oral contraceptives, oral/injectable progestogens, non-steroidal anti-inflammatory drug, or anti-fibrinolytic agent) must be followed. * Women taking hormone replacement therapy * Women with symptoms such as intermenstrual or post-coital bleeding, unless an endometrial biopsy has been performed and pathology excluded * Women with fibroids that are palpable abdominally or who have intra-cavity fibroids and/or whose uterine length as measured at ultrasound or hysteroscopy is greater than 12 cm (NICE guideline 2007) * Women on anticoagulative therapy or other treatment (including e.g. Copper IUD use) known to cause menorrhagia