RCT: STARR vs Biofeedback

Inclusion Criteria: 1. Female patients \>18 years old 2. Able to comprehend, follow, and provide written informed consent. 3. Minimum ODS Score of seven at screening. 4. Negative pregnancy test, by urine. 5. 'Obstructed' defecation requiring straining/digitation as presenting lead symptom. 6. Adequate external sphincter on rectal digital examination. 7. Evidence of anterior rectocele and/or rectal intussusception on dynamic defecography. (Note: dynamic defecography taken within 12 months will be acceptable) 8. Willingness to comply with study requirements including follow-up visits Exclusion Criteria: Evidence of external sphincter injury associated with incontinence. 1. Enterocele at rest- requiring surgery. 2. Faecal incontinence (soiling and faecal urgency is admissible). 3. Any anterior defect, colpocele or cystocele requiring a combined surgical approach. 4. Physical or psychological condition which would impair participation in the study. 5. Participation in any other device or drug study within 90 days prior to enrollment. 6. Planned participation in any other device study during the timeframe of this study. 7. General contraindication for surgery. 8. Previous transanal surgery for ODS. 9. Immunocompromised subjects