Intrauterine device (IUD): Women using ARV medication can generally use LNG-IUDs (MEC Category 2), provided that their HIV clinical disease is asymptomatic or mild (WHO stage 1 or 2). Women living with severe or advanced HIV clinical disease (WHO stage 3 or 4) should generally not initiate use of the LNG-IUD (MEC Category 3 for initiation) until their illness has improved to asymptomatic or mild HIV clinical disease. However, women who already have an LNG-IUD inserted and who develop severe or advanced HIV clinical disease need not have their IUD removed (MEC Category 2 for continuation). LNG-IUD users with severe or advanced HIV clinical disease should be closely monitored for pelvic infection (Part I, section 12d).