Uterine Balloon Treatment for Heavy Period Bleeding.

Inclusion Criteria: * Female at least 30 years of age who is premenopausal and for whom childbearing is complete. * Excessive menstrual bleeding documented by a diary score of at least 150. * Have documented 3 months failed medical therapy or either a) contraindicated for or b) refused medical therapy. * Have an anatomically normal uterine cavity sounding at least 4cm, but not greater than 12cm. * Have a normal pap smear and no unexplained abnormal pap smears within 1 year of the procedure. * Agree not to switch from hormonal to non-hormonal contraception or vice versa during or just prior to the study. * Agree to use reliable contraception throughout the study. * Freely agree to participate in the study, including all study related procedures and evaluations, and document this agreement by signing informed consent documentation. Exclusion Criteria: * Active pelvic inflammatory disease (PID) or recurrent chronic PID. * Active genital or urinary tract infection at the time of the procedure. * History of malignancy of the reproductive system within 5 years of the procedure or have ever had malignancy of the endometrium. * Endometrial neoplasia, determined by endometrial biopsy taken within 6 months of procedure. * Cavity distorting submucous myoma(s) determined by preoperative hysterogram, hysteroscopy, or transvaginal sonography within 6 months of the procedure. * Previous endometrial ablation procedure. * Previous uterine surgeries (such as full thickness myomectomy, subserosal myomectomy, uterine reconstruction, or any surgery in which thinning of the uterine musculature could occur) except for low transverse caesarean section. * Pregnant or desirous of future pregnancy. * Taken endometrial suppression medication, except for oral contraceptives, within 3 months of the procedure. * Concurrent open or laparoscopic surgery.