A device, system, and method that may help reduce complications associated with placing an intrauterine balloon in the uterine cavity of a patient is provided. In one aspect, the system includes an inflatable balloon, an inflation line having a distal end in communication with the balloon an inner member comprising an elongate tubular body having a distal and proximal end a slot extending from the distal to proximal end of the inner member, and an outer sheath in which the inner member is removably insertable. The outer sheath is configured to receive the balloon in a furled state therein such that the balloon may be introduced into the uterine cavity by transvaginally inserting the outer sheath through an endocervical canal of the patient and then introducing the balloon into the uterine cavity by moving the inner member through the outer sheath in the direction of uterine cavity.
