The procedure of choice for stress urinary incontinence in females is what is called a sling procedure. A sling implant usually consists of a synthetic mesh material in the shape of a narrow ribbon but sometimes a biomaterial (bovine or porcine) or the patients own tissue that is placed under the urethra through one vaginal incision and two small abdominal incisions. The idea is to replace the deficient pelvic floor muscles and provide a backboard of support under the urethra. Transvaginal mesh has recently come under scrutiny due to controversy relating to the Food and Drug Administration. Initially, the FDA approved implantable mesh devices due to their similarity to earlier prototypes, known as the 510(k) process. As patients allege long-term harm and suffering as a result of implanted mesh; the FDA released a safety communication in 2008, and led to the reclassification of surgical mesh to a class 3 or high risk device in January 2016. Insertion of a sling through the vagina (rather than by opening the lower abdomen) is called "intravaginal slingplasty" (IVS).