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Obstetric Fistula

Obstetric fistula is the urogenital and/or rectovaginal fistula produced by prolonged obstructed labor without timely access to emergency obstetric care. It is the global paradigm of catastrophic obstetric injury — virtually eliminated in high-income countries through universal cesarean access, but persistent in sub-Saharan Africa, South Asia, and conflict-affected regions, with an estimated 2 million women living with untreated fistula and 50,000–100,000 new cases per year.[1][3][5] The clinical character is fundamentally different from iatrogenic VVF: this is a massive ischemic field injury that destroys soft tissue across the maternal pelvis, often involves the urethra, and clusters with multisystem injuries known collectively as the obstructed labour injury complex.[3]

For the iatrogenic counterpart and the broader operative principles, see Vesicovaginal Fistula and the Fistulas section landing.

Epidemiology​

  • Prevalence of clinically confirmed obstetric fistula: ~0.29 per 1,000 women of reproductive age globally; 1.60/1,000 in sub-Saharan Africa, 1.20/1,000 in South Asia (likely conservative).[1]
  • Incidence ~0.09 per 1,000 among recently pregnant women.[1]
  • Backlog of ~2 million women living with untreated fistula; surgical capacity is vastly outstripped by new cases.[3][5]
  • Age — most patients are < 25 years; many are 13–14. Bimodal distribution with peaks in primigravid women and women with ≥ 4 pregnancies.[3]
  • Time to treatment — average 5.7 years between injury and surgery; only 4% of women find care independently.[6]

Pathogenesis — The Obstructed Labour Injury Complex​

The mechanism is field ischemia, not point injury:[3]

  1. The fetal head impacts in the maternal pelvis under sustained uterine contractions
  2. Soft tissues of the vagina, bladder, and rectum are crushed against the maternal pelvic bones
  3. Perfusion to the compressed tissues is progressively shut off
  4. Widespread ischemic necrosis develops across the pelvis
  5. Fetal case fatality is ~95% from asphyxiation
  6. After 1–2 days, the macerated fetus is expelled vaginally
  7. Several days later, the necrotic vesicovaginal (and often rectovaginal) tissue sloughs, leaving a fistula

The fistula sits within a much wider zone of sublethal ischemic injury that becomes dense fibrous scar — this is the principal reason obstetric fistula is harder to repair than iatrogenic VVF and the reason recurrence rates are higher.

Multisystem injuries clustered with the fistula​

SystemInjuries
UrologicalVVF; urethrovaginal, vesicocervical, ureterovaginal, complete urethral destruction; stress incontinence; bladder stones; hydroureteronephrosis; chronic pyelonephritis; renal failure
GynecologicSevere vaginal stenosis (sometimes near-obliteration); cervical destruction; secondary amenorrhea; secondary infertility; PID
GastrointestinalRectovaginal fistula; rectal stenosis or atresia; anal sphincter incompetence
MusculoskeletalOsteitis pubis
NeurologicFoot-drop (lumbosacral plexus or common peroneal nerve compression); neuropathic bladder
DermatologicChronic excoriation from urine and fecal maceration
SocialStigma, divorce, abandonment, displacement, malnutrition, depression, suicide

Risk Factors​

A complex interplay of biological, social, and economic forces.[2][3][7][8]

Biological / obstetric​

FactorEffect
Prolonged labor (> 24 h)AOR 4.0[8]
Cephalopelvic disproportionMost common direct cause (~65% of obstructed labor)[9]
Short maternal stature (≤ 150 cm)AOR 2.63[2]
Macrosomia (≥ 3.5 kg)AOR 1.52[2]
PrimiparityHighest risk in young primigravidas[3]
Post-term pregnancyAOR 8.0[8]
Malpresentation~31% of obstructed labor cases[9]

Socioeconomic​

  • Poverty is the fundamental enabling condition[3]
  • Early marriage and childbearing (age < 18 at first pregnancy)
  • Low or no education — post-primary education is protective (AOR 0.31)[2]
  • Rural residence (AOR 4.0)[8]; lack of antenatal care (AOR 5.0); no modern contraception (AOR 5.0)
  • Lack of access to emergency obstetric services — the single most important factor[3]
  • Adolescent malnutrition and stunted pelvic growth

Iatrogenic contribution​

In some modern series cesarean section itself contributes to fistula — in one Ugandan cohort, ~25% of fistulas were iatrogenic injuries during cesarean delivery (AOR 13.30 in unadjusted comparison).[2]

Classification​

No single system is universally accepted; three are in active use, with Goh carrying the strongest predictive validity.[10][11][12]

Waaldijk (1995)​

TypeDefinition
IFistula not involving the urethral closing mechanism
IIFistula involving the urethral closing mechanism — IIA without (sub)total urethral involvement; IIB with (sub)total urethral involvement; further (a) without and (b) with circumferential defect
IIIUreteral and other exceptional fistulas

Surgical complexity worsens progressively from I → IIBb.[11]

Goh​

Three axes — distance of fistula from the external urethral meatus (Types 1–4), fistula size (a / b / c), and degree of fibrosis / vaginal scarring (i / ii / iii). In a head-to-head comparison, Goh outperformed Waaldijk for predicting closure (p = 0.04), and Goh Type 4 fistulas were significantly less likely to close than Types 1 or 2 (p = 0.014).[10]

Panzi score​

A parsimonious data-driven score derived from Goh + Waaldijk that distills three predictors of failure: circumferential defect, proximity to the external urethral orifice, and size. Each one-point increase in the 0–3 score multiplies the odds of surgical failure by ~1.65.[12]

Prognostic factors regardless of system​

Degree of scarring at the operative field, urethral continence-mechanism involvement, fistula size and bladder tissue loss, and concurrent injuries (especially RVF).[3]

Clinical Presentation​

  • Continuous urinary leakage per vagina — the hallmark; begins ~3–10 days postpartum as the necrotic slough separates[3]
  • Concurrent fecal incontinence when RVF is present
  • Foul odor from chronic soiling
  • Severe perineal and inner-thigh skin excoriation
  • Amenorrhea / secondary infertility
  • Foot-drop from intrapartum nerve compression
  • Severe vaginal stenosis with sometimes near-total obliteration
  • Stillbirth of the index pregnancy in the vast majority

Diagnostic Evaluation​

Diagnosis in low-resource settings is overwhelmingly clinical:

  • Speculum exam — direct visualization
  • Dye test — methylene blue intravesically with vaginal gauze
  • Systematic mapping — fistula location, size, scarring, urethral involvement, circumferential defect (key prognostic finding), concurrent RVF, vaginal canal patency, sphincter integrity
  • Imaging when available — CT urogram or IVP for the upper tracts (rule out ureteral involvement); MRI in complex repairs

Management​

Conservative​

If the patient presents within ~3 months of injury, continuous bladder drainage with an indwelling catheter can allow spontaneous closure of small fistulas (< 1 cm) in selected cases.[3] In practice, the great majority of patients present months to years after injury and require operative repair.

Surgical repair​

The first operation offers the best chance of success — every subsequent attempt is harder and less likely to close.[3][13]

Timing. Traditional teaching favors waiting ≥ 3 months for inflammation to resolve and the full extent of injury to manifest. Waaldijk advocated early intervention with reportedly good outcomes; debate continues.[3]

Approach. Most obstetric fistulas are repaired transvaginally — shorter operative time, less blood loss, less postoperative pain, and shorter LOS than the abdominal approach.[1] Two main vaginal techniques:

  • Latzko partial colpocleisis — imbrication of fibromuscular tissue without excision of the tract; best for small, high vault fistulas
  • Multi-layered classic repair — circumscribe the fistula on the vaginal side, excise the tract, mobilize bladder off vaginal wall, close bladder in two layers, close vaginal epithelium

Transabdominal repair is reserved for: ureteric orifices that need reimplantation, very high or surgically inaccessible fistulas, and the rare case requiring concurrent bladder augmentation.[1]

Operative principles​

  • The fistula must be freed completely from surrounding scar tissue
  • Edges must coapt without tension
  • The repair should be watertight at the time of closure
  • Multi-layered, non-overlapping suture lines
  • Continuous bladder drainage for 10–14 days postoperatively
  • Tissue interposition (Martius, gracilis, omental flap) for large defects, urethral involvement, recurrent fistula, or radiation; the Browning data suggest interposition is not a default for routine obstetric VVF[1][14]

Adjunctive innovations​

In a 16-year multinational cohort of 1,185 fistula repairs, adjuncts including platelet-rich plasma, small intestinal submucosa, fibrin glue, and buccal mucosa grafts were used in 71% of complex / recurrent repairs and achieved a 72% closure rate in this most-difficult subgroup.[14]

Outcomes​

Outcomes are reasonable when measured at a global average but fall well short of WHO targets in the most complex cases.

SourceNFirst-attempt closure
Fistula Foundation (2019–2021, 110 hospitals, 27 countries)24,56887% dry and closed at discharge[6]
Systematic review / meta-analysis (LMICs)79 studies77.9% pooled[13]
Hilton & Ward large series2,48483% first attempt; 65% if ≥ 2 prior operations[3]
Mekelle Hamlin Center, Ethiopia32889.3% (VVF 86.9%; RVF 100%)[15]
Multinational single-team1,18582% overall; 91% simple primary; 85% any primary[14]

Predictors of successful closure: primary education or above, married status, alive neonatal outcome, primary (first) repair.[13]

Predictors of failure: female genital cutting, primiparity, large size, Goh ≥ Type II, urethral involvement, vaginal scarring, circumferential defect, multiple fistulas, prior repair, postoperative complications.[13]

Post-Obstetric-Fistula-Repair Incontinence (POFRI)​

A major and underappreciated problem — anatomic closure does not equal continence.[16][17][18][19]

  • Prevalence of persistent incontinence after successful closure: 16–55%[16][17]
  • Type — predominantly stress incontinence (67%); urgency 47%; mixed 47%. On urodynamics, all patients had genuine stress incontinence; none had detrusor overactivity.[16][19]
  • Severity — 53% rate it as "very severe"; 86% have > 4 g pad weight on a 2-hour pad test.[16]
  • Risk factors — fistula in first delivery, younger age at fistula, ≥ 2 prior fistula surgeries, Goh Type 3 or 4.[16][17]

FIGO 2025 expert opinion on POFRI management:[18]

  • Standardized assessment: residual urine, voiding diary, pad test, urodynamics or single-channel cystometry where available
  • Pure stress incontinence → consider surgery (pubovaginal sling)
  • Pure overactive bladder → conservative therapy (anticholinergics)
  • Mixed (OAB-predominant) → careful preoperative consideration
  • In the multinational series, residual incontinence affected 12% of patients — bulking agents (72% success) and pubovaginal slings (91% success) were the salvage operations[14]

Psychosocial Impact and Reintegration​

The injury is profoundly social as well as physical.[20][21][22][23]

  • Depression — ~37% have moderate or severe depression at intake for repair; falls to 17% at 3-month follow-up after surgery[20]
  • Coping behaviors — restricting fluids, multilayer clothing, self-isolation, allowing the husband to remarry, alcohol use, spiritual seeking[21]
  • Recovery trajectory — most physical and psychosocial improvement occurs in the first 6 months after repair; by 12 months, urinary incontinence falls from 98% to 33% and self-rated good/excellent health rises from 0% to 60%[23]
  • Mental-health intervention — the COFFEE group CBT program (CBT with Obstetric Fistula for Education and Empowerment) reduced depression, anxiety, and traumatic stress scores significantly[24]
  • Reintegration programming — health education, physical therapy, social support, psychosocial counseling, and economic empowerment improve both physical and psychosocial outcomes and should be standard adjunct care[25]

Prevention — The Three Delays​

Prevention requires addressing the Three Delays Model.[26][27][28]

  1. Delay in deciding to seek care — failure to recognize prolonged labor; competing care pathways (traditional birth attendants); lack of women's autonomy; fear of hospitals; cost
  2. Delay in reaching care — geographic and transport barriers; distance > 10 km from facility (AOR 3.89)[29]
  3. Delay in receiving care once present — inadequate emergency obstetric services; shortage of skilled providers; non-use of the partograph (AOR 5.19 for obstructed labor when partograph not used)[30]

Effective interventions: universal partograph use by trained attendants, timely cesarean section for obstructed labor, skilled birth attendance, family planning, delaying age of first pregnancy, education for girls, community economic development, and gender-equity programming.[3][26][31]

Global Health Context​

InitiativeNotes
UN Resolution 2018Called to end fistula by 2030[4]
UNFPA Campaign to End FistulaInternational advocacy and funding[3]
FIGO Fistula Surgery Training Initiative62 Fellows from 22 countries since 2012; > 10,000 repairs performed; Global Competency-Based Fistula Surgery Training Manual[5][32]
Fistula Foundation24,568 repairs at 110 hospitals in 27 countries (2019–2021); 87% closure[6]
Kenya Fistula Treatment Network6,223 surgeries over 6 years; 96% continent at 12 months; trained 11 surgeons and 424 community health volunteers[33]

The 2030 elimination target is unobtainable without sustained funding, surgical-capacity building, and universal access to emergency obstetric care.[5]

References​

1. Okada Y, Matsushita T, Hasegawa T, et al. "Surgical interventions for treating vesicovaginal fistula in women." Cochrane Database Syst Rev. 2026;1:CD015413. doi:10.1002/14651858.CD015413

2. Barageine JK, Tumwesigye NM, Byamugisha JK, Almroth L, Faxelid E. "Risk factors for obstetric fistula in western Uganda: a case control study." PLoS One. 2014;9(11):e112299. doi:10.1371/journal.pone.0112299

3. Wall LL. "Obstetric vesicovaginal fistula as an international public-health problem." Lancet. 2006;368(9542):1201–1209. doi:10.1016/S0140-6736(06)69476-2

4. Anastasi E, Asiamah B, Lal G. "Leaving no one behind: is the achievement of the Sustainable Development Goals possible without securing the dignity, rights, and well-being of those who are 'invisible'?" Int J Gynaecol Obstet. 2020;148(Suppl 1):3–5. doi:10.1002/ijgo.13031

5. Slinger G, Trautvetter L. "Addressing the fistula treatment gap and rising to the 2030 challenge." Int J Gynaecol Obstet. 2020;148(Suppl 1):9–15. doi:10.1002/ijgo.13033

6. Pollaczek L, Rajagopal K, Chu J. "Patient characteristics, surgery outcomes, presumed aetiology and other characteristics of fistula surgeries and related procedures supported by Fistula Foundation from 2019 to 2021: a multicentre, retrospective observational study." BMJ Open. 2024;14(3):e078426. doi:10.1136/bmjopen-2023-078426

7. Bulndi LB, Ireson D, Adama E, Bayes S. "Sub-Saharan African women's views and experiences of risk factors for obstetric fistula: a qualitative systematic review." BMC Pregnancy Childbirth. 2022;22(1):680. doi:10.1186/s12884-022-05013-2

8. Tilahun T, Sura B, Merdassa E. "Determinants of obstetric fistula in south-western Ethiopia." Int Urogynecol J. 2021;32(9):2505–2510. doi:10.1007/s00192-021-04690-5

9. Wonde TE, Mihretie A. "Maternofetal outcomes of obstructed labor among women who gave birth at general hospital in Ethiopia." BMC Res Notes. 2019;12(1):128. doi:10.1186/s13104-019-4165-8

10. Capes T, Stanford EJ, Romanzi L, Foma Y, Moshier E. "Comparison of two classification systems for vesicovaginal fistula." Int Urogynecol J. 2012;23(12):1679–1685. doi:10.1007/s00192-012-1671-9

11. Waaldijk K. "Surgical classification of obstetric fistulas." Int J Gynaecol Obstet. 1995;49(2):161–163. doi:10.1016/0020-7292(95)02350-l

12. Mukwege D, Peters L, Amisi C, et al. "Panzi score as a parsimonious indicator of urogenital fistula severity derived from Goh and Waaldijk classifications." Int J Gynaecol Obstet. 2018;142(2):187–193. doi:10.1002/ijgo.12514

13. Zeleke LB, Welsh A, Abeje G, Khejahei M. "Proportions and determinants of successful surgical repair of obstetric fistula in low- and middle-income countries: a systematic review and meta-analysis." PLoS One. 2024;19(5):e0303020. doi:10.1371/journal.pone.0303020

14. Mourad MS, Malallah M, Mahfouz W, et al. "Sixteen years of multinational experience in female genital fistula repair: integrating traditional and innovative surgical approaches across 12 countries." Neurourol Urodyn. 2026;45(3):583–590. doi:10.1002/nau.70226

15. Kumsa Meikena H, Bihon AM, Serka S. "Predictors and outcomes of surgical repair of obstetric fistula at Mekelle Hamlin Fistula Center, northern Ethiopia." Int Urogynecol J. 2023;34(8):1891–1898. doi:10.1007/s00192-023-05483-8

16. Nardos R, Jacobson L, Garg B, et al. "Characterizing persistent urinary incontinence after successful fistula closure: the Uganda experience." Am J Obstet Gynecol. 2022;227(1):70.e1–70.e9. doi:10.1016/j.ajog.2022.03.008

17. Kopp DM, Tang JH, Bengtson AM, et al. "Continence, quality of life and depression following surgical repair of obstetric vesicovaginal fistula: a cohort study." BJOG. 2019;126(7):926–934. doi:10.1111/1471-0528.15546

18. Goh J, Browning A, Slinger G, Trautvetter L. "FIGO expert opinion: management of post-obstetric fistula repair incontinence for vesicovaginal fistula." Int J Gynaecol Obstet. 2025. doi:10.1002/ijgo.70384

19. Nardos R, Phoutrides EK, Jacobson L, et al. "Characteristics of persistent urinary incontinence after successful fistula closure in Ethiopian women." Int Urogynecol J. 2020;31(11):2277–2283. doi:10.1007/s00192-020-04265-w

20. Watt MH, Nguyen TV, Touré C, et al. "Integrated mental health screening for obstetric fistula patients in Mali: from evidence to policy." PLoS One. 2020;15(9):e0238777. doi:10.1371/journal.pone.0238777

21. Hurissa BF, Koricha ZB, Dadi LS. "Challenges and coping mechanisms among women living with unrepaired obstetric fistula in Ethiopia: a phenomenological study." PLoS One. 2022;17(9):e0275318. doi:10.1371/journal.pone.0275318

22. Hurissa BF, Koricha ZB, Dadi LS. "Quality of life and its predictive factors among women with obstetric fistula in Ethiopia: a cross-sectional study." Front Public Health. 2022;10:987659. doi:10.3389/fpubh.2022.987659

23. El Ayadi AM, Barageine J, Korn A, et al. "Trajectories of women's physical and psychosocial health following obstetric fistula repair in Uganda: a longitudinal study." Trop Med Int Health. 2019;24(1):53–64. doi:10.1111/tmi.13178

24. Gladstone TRG, Ugueto AM, Muleta M, et al. "Development and pilot test of a group cognitive behavioral intervention for women recovering from fistula repair surgery in Ethiopia." Front Public Health. 2022;10:862351. doi:10.3389/fpubh.2022.862351

25. El Ayadi AM, Painter CE, Delamou A, et al. "Rehabilitation and reintegration programming adjunct to female genital fistula surgery: a systematic scoping review." Int J Gynaecol Obstet. 2020;148(Suppl 1):42–58. doi:10.1002/ijgo.13039

26. Wall LL. "Preventing obstetric fistulas in low-resource countries: insights from a Haddon matrix." Obstet Gynecol Surv. 2012;67(2):111–121. doi:10.1097/OGX.0b013e3182438788

27. Wall LL. "Overcoming Phase 1 delays: the critical component of obstetric fistula prevention programs in resource-poor countries." BMC Pregnancy Childbirth. 2012;12:68. doi:10.1186/1471-2393-12-68

28. Lufumpa E, Doos L, Lindenmeyer A. "Barriers and facilitators to preventive interventions for the development of obstetric fistulas among women in sub-Saharan Africa: a systematic review." BMC Pregnancy Childbirth. 2018;18(1):155. doi:10.1186/s12884-018-1787-0

29. Desta M, Mekonen Z, Alemu AA, et al. "Determinants of obstructed labour and its adverse outcomes among women who gave birth in Hawassa University Referral Hospital: a case-control study." PLoS One. 2022;17(6):e0268938. doi:10.1371/journal.pone.0268938

30. Zelellw D, Tegegne T. "The use and perceived barriers of the partograph at public health institutions in East Gojjam Zone, northwest Ethiopia." Ann Glob Health. 2018;84(1):198–203. doi:10.29024/aogh.23

31. Miller S, Lester F, Webster M, Cowan B. "Obstetric fistula: a preventable tragedy." J Midwifery Womens Health. 2005;50(4):286–294. doi:10.1016/j.jmwh.2005.03.009

32. Slinger G, Trautvetter L, Browning A, Rane A. "Out of the shadows and 6000 reasons to celebrate: an update from FIGO's Fistula Surgery Training Initiative." Int J Gynaecol Obstet. 2018;141(3):280–283. doi:10.1002/ijgo.12482

33. Pollaczek L, El Ayadi AM, Mohamed HC. "Building a country-wide fistula treatment network in Kenya: results from the first six years (2014–2020)." BMC Health Serv Res. 2022;22(1):280. doi:10.1186/s12913-021-07351-x