<prompt> MIRENA life is:3 years1 year5 years10 years  <response>: Ref: Dutta Textbook of Obstetrics pg 538,539.543Explanation:MIRENAMIRENA is levonorgestrel releasing Intra uterine deviceCauses uniform and strong suppression of endometriumTotal LNG 52mg released at 20mcg per dayReplaced every 5 yrsMechanism of ActionThinning of endometrial liningInhibition of sperm movementThickening of cervical mucusNon contraceptive benefitsReduction in menorrhagiaDvsmenorrhoeaPremenstrual syndrome.Used in treatment ofEndometrial hyperplasia.Adenomyosis,Uterine leiomyomaEndometrial caHormone replacement therapy 