Are, or think they may be, pregnant[16] Have abnormal vaginal bleeding that has not been explained[16] Have untreated cervical or uterine cancer[16] Have, or may have, breast cancer[16] Have abnormalities of the cervix or uterus[34] Have had pelvic inflammatory disease within the past three months[16] Have had an STI such as chlamydia or gonorrhea within the past three months[16] Have liver disease or tumor[34] Have an allergy to levonorgestrel or any of the inactive ingredients included in the device[34]