A Post-Market Evaluation of the Altis® Single Incision Sling System versus Transobturator or Retropubic Mesh Sling in the Treatment of Female Stress Urinary Incontinence (Altis 522 Trial) The Altis 522 trial that will compare the safety and effectiveness of the Altis single incision sling to either transobturator or retropubic slings. All slings used in the trial are already commercially available and are being used by physicians. You and your doctor have decided that the Altis sling is the best treatment option for you. After you have your procedure for placement of the Altis sling, you will visit your doctor at the following times: 6 months, 12 months, 18 months, 24 months, and 36 months. Your doctor will report on your continence status at each visit. After the 36-month visit, you will be exited from the trial.