(A) Mirena® intrauterine system without hormone sleeve, (B) hormone sleeve in uterine cavity and (C) hormone sleeve in uterine cavity. (A) Mirena® intrauterine system without hormone sleeve, (B) hormone sleeve in uterine cavity and (C) hormone sleeve in uterine cavity. James Parker, and Ancél Orr J Fam Plann Reprod Health Care 2011;37:62 Copyright © by the BMJ Publishing Group Ltd & the Faculty of Sexual & Reproductive Healthcare of the Royal College of Obstetricians & Gynaecologists. All rights reserved.