This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Methods - Progestogen-Only Contraception, Subject name: Gynaecology & Obstetrics
MIRENA life is: 
Select and explain. 
A. 3 years, B. 1 year, C. 5 years, D. 10 years
C: 5 years
Answer: C: 5 years 
Explanation: 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