Female Pelvic Examination & POP-Q Staging
The female urogenital physical examination is the cornerstone of pelvic floor assessment. A structured, systematic approach allows accurate characterization of pelvic organ prolapse (POP), urethral pathology, levator ani function, and neurological integrity. The Pelvic Organ Prolapse Quantification (POP-Q) system, introduced by Bump et al. in 1996, provides the internationally standardized and reproducible framework for staging prolapse. This page covers the complete examination technique, POP-Q methodology, levator ani assessment, urethral evaluation, cough stress test, and perineal neurological examination.
Equipment
| Item | Purpose |
|---|---|
| Examination table with stirrups | Lithotomy positioning |
| Split (bivalve) speculum or Sims speculum | Anterior/posterior wall isolation |
| Ring forceps or swab | Apex reduction during examination |
| Ruler or measuring probe (centimetric) | POP-Q measurements |
| Cotton-tipped applicator (Q-tip) | Urethral hypermobility assessment |
| Goniometer or protractor | Q-tip angle measurement |
| Gloves, lubricant | Standard |
| Saline/iodine swabs | Perineal preparation if needed |
| Urine dipstick / MSU pot | Exclude infection pre-urodynamics |
Examination Positions
Dorsal lithotomy (standard): Used for the majority of the examination including POP-Q measurements, speculum examination, bimanual palpation, and neurological assessment. This position may underestimate the degree of prolapse because the pelvic floor is partially supported.
Standing (orthostatic): One foot elevated on a step-stool. Critically important when symptoms are disproportionate to lithotomy findings. Gravity augments descent, reproducing physiological loading conditions. At least 50% of women with symptomatic prolapse will have a higher POP-Q stage on standing.
Left lateral (Sims): Alternative when lithotomy is not feasible. A Sims speculum can assess individual vaginal walls.
Structured Examination Sequence
Step 1: External Genitalia Inspection
Inspect vulva, labial architecture, clitoral hood, vestibule, and introitus. Note:
- Estrogen status: Atrophic vaginitis (pallor, reduced rugation, labial atrophy) affects examination compliance and surgical outcomes
- Skin lesions: Lichen sclerosus (white plaques, figure-of-eight distribution, architectural distortion), lichen planus, condylomata, neoplasia
- Perineal body: Normal ~3–4 cm from posterior fourchette to anal verge; perineal scarring indicates obstetric perineal body defect contributing to posterior compartment prolapse
- Anal verge: External hemorrhoids, skin tags, excoriation (fecal incontinence), rectal prolapse
Step 2: Urethral Meatus Inspection
The urethral meatus lies ~2–3 cm posterior to the clitoris. Inspect for:
- Urethral caruncle: Benign red polypoid protrusion from the posterior lip of the meatus; common in postmenopausal women. Distinguish from urethral prolapse (circumferential 360° mucosal eversion) and urethral carcinoma (firm, irregular, bleeds spontaneously — biopsy if doubt)
- Urethral diverticulum: Suburethral fluctuant mass on anterior vaginal wall; gentle compression toward meatus may express purulent discharge (positive "milking" sign — see Section 4)
- Meatal stenosis: Inability to pass 14 Fr catheter — pathognomonic for female urethral stricture
Step 3: Anterior Vaginal Wall
With the patient at rest then sustained Valsalva (≥3 seconds), inspect and palpate the anterior wall:
- Cystocele: Bulge of anterior wall below the hymen, representing bladder base descent
- Central vs. lateral defects: Central defect produces smooth symmetric midline bulge; lateral (paravaginal) defect produces sulcal obliteration. Use split speculum technique (posterior blade depressing posterior wall) for isolated anterior wall assessment
Step 4: Posterior Vaginal Wall
Retract anterior wall with anterior speculum blade; observe posterior wall during Valsalva:
- Rectocele: Posterior wall bulge, usually mid-to-lower segment, from rectal herniation
- Enterocele: Small bowel peritoneal herniation into posterior wall at the vaginal apex; often produces peristaltic impulse. Confirmed by simultaneous rectovaginal examination (enterocele will contain a separate peritoneal sac above the rectal finger)
- Perineal descent: Ballooning of perineum during straining
Step 5: Cervix / Vaginal Apex
Identify cervix or post-hysterectomy vaginal cuff. Note:
- Uterine descent: Staged by POP-Q point C
- Cervical elongation: C substantially less negative than D (large C−D difference) → cervix elongated, not true uterine descent
- Vault prolapse: Post-hysterectomy; point C = vaginal cuff
Step 6: Bimanual Examination
Standard bimanual for uterine size/position, adnexal masses, cervical motion tenderness, anterior vaginal wall tenderness (urethral diverticulum), and levator ani palpation.
Step 7: Rectovaginal Examination
Index finger in vagina, middle finger in rectum — important when enterocele or posterior compartment pathology is suspected:
- Enterocele: Peritoneal sac felt between two fingers; may feel loops of bowel
- Rectocele: Rectal bulging into vagina felt anteriorly
- Perineocele: Perineal body deficiency with rectal wall bulging posteriorly
Split Speculum Technique
The split speculum technique is essential for isolating compartments during POP-Q measurement:
- Separate a bivalve (Graves or Pedersen) speculum into anterior and posterior blades
- Posterior blade first: Depress posterior wall → exposes anterior wall and apex for Valsalva assessment
- Anterior blade second: Remove posterior blade; retract anterior wall → exposes posterior wall for Valsalva assessment
- Both blades for measuring genital hiatus, perineal body, and TVL at rest
:::tip Valsalva vs. Cough Use sustained Valsalva (bearing down ≥3 seconds) for POP-Q measurement — not coughing. Cough produces a brief pressure spike that may not represent maximum descent. Maximum prolapse extent is achieved with sustained Valsalva. :::
POP-Q System (Pelvic Organ Prolapse Quantification)
Background
The POP-Q system was developed by an ICS/AUGS/SGS committee and published in 1996. It replaced all prior descriptive/ordinal staging systems and is the required staging method for peer-reviewed publications.
Bump RC, Mattiasson A, Bo K, et al. The standardization of terminology of female pelvic organ prolapse and pelvic floor dysfunction. Am J Obstet Gynecol. 1996;175(1):10–17. PMID: 8694033
Reference Plane: The Hymen
All measurements are referenced to the hymeneal ring:
| Value | Meaning |
|---|---|
| 0 cm | At the hymen |
| Negative (−) | Proximal (above, inside) the hymen — normal position |
| Positive (+) | Distal (below, outside) the hymen — prolapsed |
Measurements taken at maximum Valsalva except TVL (measured at rest with prolapse reduced).
The Nine Measurement Points
Aa — Anterior Vaginal Wall Fixed Reference
A point on the anterior vaginal wall 3 cm proximal to the urethral meatus, representing the approximate urethrovesical junction.
- Range: −3 cm (fully supported) to +3 cm (maximum). Fixed range.
- Clinical relevance: Anterior wall support at the bladder neck/proximal urethra
Ba — Anterior Vaginal Wall Most Dependent Point
The most distal position of any part of the anterior vaginal wall between the hymen and Aa.
- Range: −3 cm to +TVL
- Clinical relevance: Leading edge of the cystocele; changes most dramatically with severe anterior prolapse
C — Cervix or Vaginal Cuff Apex
Leading edge of the cervix (uterus present) or vaginal cuff (post-hysterectomy).
- Range: Strongly negative to +TVL
- Clinical relevance: Apical descent. A well-supported apex (strongly negative C) with Stage II anterior prolapse suggests paravaginal/urethral support defect rather than apical failure
D — Posterior Fornix
Location of the posterior vaginal fornix (uterosacral ligament attachment to cervix posteriorly). Omitted post-hysterectomy.
- Clinical relevance: Comparing C and D distinguishes cervical elongation from true uterine descent. If C is substantially less negative than D, cervical elongation is present (C − D ≈ cervical length)
Ap — Posterior Vaginal Wall Fixed Reference
A point on the posterior vaginal wall 3 cm proximal to the hymen. Posterior analog of Aa.
- Range: −3 cm to +3 cm (fixed)
- Clinical relevance: Posterior wall support at the distal third; descent reflects distal rectocele or perineal body involvement
Bp — Posterior Vaginal Wall Most Dependent Point
The most distal position of any part of the posterior vaginal wall between the hymen and Ap.
- Range: −3 cm to +TVL
- Clinical relevance: Leading edge of a rectocele or enterocele
gh — Genital Hiatus
Distance from the middle of the external urethral meatus to the posterior midline hymen. Measured at rest.
- Normal: 2–4 cm. Values >4 cm suggest widened hiatus (levator deficiency, obstetric injury)
- Clinical relevance: Large gh is a risk factor for prolapse recurrence and is associated with levator avulsion
pb — Perineal Body
Distance from the posterior midline hymen to the midanal opening. Measured at rest.
- Normal: 2–4 cm. Values <2 cm suggest perineal body deficiency
- Clinical relevance: Short pb indicates obstetric perineal damage; informs posterior colporrhaphy ± perineoplasty planning
tvl — Total Vaginal Length
Greatest depth of the vagina when prolapse is fully reduced. Measured at rest.
- Normal: 7–10 cm
- Clinical relevance: Ensures contextual interpretability of all measurements. A post-repair tvl <6 cm suggests over-shortening.
POP-Q 3×3 Grid
Results are recorded in the standardized grid:
┌──────────┬──────────┬──────────┐
│ Aa │ Ba │ C │
├──────────┼──────────┼──────────┤
│ gh │ pb │ tvl │
├──────────┼──────────┼──────────┤
│ Ap │ Bp │ D │
└──────────┴──────────┴──────────┘
Example: Stage III anterior prolapse with normal apex
┌──────────┬──────────┬──────────┐
│ +2 │ +4 │ −7 │
├──────────┼──────────┼──────────┤
│ 4 │ 3 │ 9 │
├──────────┼──────────┼──────────┤
│ −3 │ −3 │ −8 │
└──────────┴──────────┴──────────┘
Interpretation: Ba +4 cm establishes Stage III. Apex (C −7, D −8) is well supported. Normal posterior compartment.
Example: Complete vault prolapse (Stage IV, post-hysterectomy)
┌──────────┬──────────┬──────────┐
│ +3 │ +8 │ +8 │
├──────────┼──────────┼──────────┤
│ 6 │ 2 │ 8 │
├──────────┼──────────┼──────────┤
│ +3 │ +8 │ — │
└──────────┴──────────┴──────────┘
D omitted post-hysterectomy. Ba = Bp = C = +8; tvl = 8; Stage IV (leading edge ≥ tvl − 2 = 6 cm). Widened hiatus (gh = 6), short perineal body (pb = 2).
POP-Q Staging
Staging is determined by the most severe (most distal) single point among Aa, Ba, C, D, Ap, Bp — not by averaging.
| Stage | Criteria |
|---|---|
| 0 | No prolapse. Aa, Ba, Ap, Bp = −3; C and D ≤ −(tvl − 2) |
| I | Most distal point >1 cm above the hymen (<−1 cm) |
| II | Most distal point between −1 and +1 cm (inclusive) — at or near the hymen |
| III | Most distal point >+1 cm but less than (tvl − 2) cm |
| IV | Most distal point ≥ (tvl − 2) cm — essentially complete vaginal eversion |
:::tip Staging Rules
- gh and pb are not used in staging — they are descriptors of hiatal and perineal body integrity
- tvl only defines the upper boundary of Stage IV and the Stage 0 criterion for C/D
- Most women become symptomatic at Stage II–III
- Stage II is the visual threshold where prolapse becomes apparent at the introitus :::
Compartment-to-Surgical-Implication Summary
| Compartment | Key Points | Associated Defect | Surgical Options |
|---|---|---|---|
| Anterior | Aa, Ba | Cystocele (central or paravaginal) | Anterior colporrhaphy, paravaginal repair, Burch |
| Apical | C, D | Uterine descent, vault prolapse | Sacrocolpopexy, uterosacral suspension, sacrospinous fixation |
| Posterior | Ap, Bp | Rectocele, enterocele, perineal defect | Posterior colporrhaphy, perineorrhaphy, enterocele repair |
| Hiatus/Perineum | gh, pb | Levator deficiency, perineal injury | Perineoplasty, levatorplasty |
Levator Ani Assessment
Anatomy
The levator ani consists of the pubococcygeus (including pubovisceral: puborectalis + pubovaginalis), iliococcygeus, and ischiococcygeus (coccygeus). The pubovisceral muscle is the dominant support component and the muscle most commonly injured at vaginal delivery.
Digital Bidigital Palpation
With the patient in lithotomy and examining finger(s) inserted 4–5 cm along the posterior lateral vaginal walls:
- Resting tone: Normal is firm muscular resistance without tenderness. Hypertonic pelvic floor (non-relaxing levator ani) is clinically significant for dyspareunia, voiding dysfunction, and pelvic pain.
- Voluntary contraction: "Squeeze the muscles as if stopping urine flow." Normal = distinct circumferential inward and cephalad squeeze. Document substitution patterns (gluteal contraction, abdominal bracing, Valsalva instead of pelvic contraction).
- Relaxation: After squeeze, confirm full relaxation. Failure to relax indicates hypertonic pelvic floor syndrome.
- Voluntary Valsalva: Note ease of bearing down, symmetry of perineal descent.
PERFECT Scoring System
The PERFECT scheme (Laycock, 1994) provides a structured digital evaluation of pelvic floor muscle function:
| Letter | Parameter | Description |
|---|---|---|
| P | Power (Modified Oxford Scale) | Voluntary contraction grade 0–5 |
| E | Endurance | Duration (seconds) of sustained maximum voluntary contraction |
| R | Repetitions | Number of 10-second contractions before fatigue |
| F | Fast contractions | Number of 1-second fast contractions before fatigue |
| E | Every contraction | Consistent quality throughout the set |
| C | Co-contraction | Absence of inappropriate co-contractions (abdominal, gluteal) |
| T | Timing | Ability to pre-contract before cough (protective reflex) |
Modified Oxford Scale (Power — P):
| Grade | Description |
|---|---|
| 0 | No contraction |
| 1 | Flicker — slight, non-sustained activity |
| 2 | Weak — low-resistance contraction without lift |
| 3 | Moderate — detectable squeeze with lift against gravity |
| 4 | Good — contraction with lift against moderate resistance |
| 5 | Strong — contraction with lift against strong resistance, sustained |
Normal PERFECT values (Bø and Sherburn reference range): Power Grade 3–5; Endurance 8–10 seconds; Repetitions ≥8–10; Fast contractions ≥8–10.
Levator Avulsion Detection
Levator avulsion (partial or complete detachment of the pubovisceral muscle from the pubic ramus) affects ~10–30% of women after vaginal delivery. On digital examination:
Technique:
- Insert a single finger 3–4 cm into the vagina
- Palpate bilaterally along the posterior pubic rami at the pubovisceral insertion (10 o'clock and 2 o'clock positions)
- An avulsion produces a defect in muscular resistance — the finger encounters only soft tissue rather than firm muscle at the insertion; the affected side feels "open"
Findings:
| Finding | Significance |
|---|---|
| Unilateral defect at 10 or 2 o'clock | Unilateral pubovisceral avulsion |
| Bilateral defect + wide hiatus at rest | Bilateral avulsion — high prolapse recurrence risk |
| Asymmetric contraction (strong one side, absent other) | Functional unilateral avulsion |
Clinical detection sensitivity is ~80–90% vs. MRI reference when performed by experienced examiners. Levator avulsion on examination or MRI predicts higher prolapse recurrence after native tissue repair and may favor mesh augmentation.
Urethral Assessment
Q-Tip Test (Urethrovesical Junction Hypermobility)
The Q-tip test quantifies UVJ mobility, standardized by Crystle et al. (1971).
Technique:
- Patient in lithotomy position
- Optional: 2% lidocaine gel instilled into urethra for 1–2 minutes
- Insert sterile cotton-tipped applicator through meatus to the UVJ (~4–5 cm; resistance felt at UVJ)
- Allow applicator to rest — note resting angle from horizontal
- Patient performs maximum Valsalva or cough — measure straining angle from horizontal
- Calculate deflection angle = straining angle − resting angle
Interpretation:
| Deflection | Interpretation | Clinical Implication |
|---|---|---|
| <30° | Normal UVJ mobility | Consider ISD if patient is incontinent |
| ≥30° | Urethral hypermobility | Anatomic support failure; mid-urethral sling appropriate |
| >45° | Severe hypermobility | High-grade support failure |
:::info ISD vs. Hypermobility A non-hypermobile urethra (<30° deflection) in a woman with objective stress incontinence suggests intrinsic sphincter deficiency (ISD) as the primary mechanism. ISD is associated with MUCP <20 cmH₂O or ALPP <60 cmH₂O on urodynamics. These patients may require bulking agents or a pubovaginal sling rather than a standard mid-urethral sling.
Hypermobility is neither sufficient nor necessary for SUI — many hypermobile women are continent, and some ISD patients have minimal hypermobility. :::
Urethral Diverticulum Palpation
Classic triad: dysuria, dyspareunia, post-void dribbling (the "3 Ds"). Many are asymptomatic or present with recurrent UTI.
Milking maneuver:
- Insert lubricated index finger along anterior vaginal wall
- Palpate full urethral length from bladder neck to meatus
- UD typically presents as a tender, fluctuant, cystic suburethral mass along anterior wall (most common: mid-urethra)
- Apply firm anterior-to-posterior pressure along the urethra toward the meatus
- Expression of fluid from the urethral meatus = pathognomonic positive milking sign
Differential: Anterior Vaginal Wall Mass
| Diagnosis | Key Features |
|---|---|
| Urethral diverticulum | Fluctuant, tender, mid-urethral; positive milking sign |
| Skene's gland cyst | Periurethral, lateral to meatus, usually asymptomatic |
| Gartner's duct cyst | Lateral anterior wall, non-tender, along lateral sulcus |
| Bartholin's gland cyst | Posterolateral at introitus — not anterior wall |
| Paraurethral leiomyoma | Firm, rubbery, non-fluctuant; confirm with MRI |
| Urethral carcinoma | Firm, irregular, may bleed; rare; biopsy required |
Confirmatory imaging: MRI pelvis with urethral protocol (T2 sagittal and axial, small FOV) is gold standard; VCUG may demonstrate contrast filling the diverticulum if the neck is patent.
Cough Stress Test (CST)
Purpose
Demonstrates objective stress urinary incontinence (SUI) — involuntary leakage of urine coincident with increased intra-abdominal pressure. Required for documentation prior to anti-incontinence procedures.
Technique
Bladder filling: Comfortably full bladder (patient has not voided within 1 hour) or bladder filled to 250–300 mL by retrograde catheter instillation.
- Supine lithotomy: Insert vaginal speculum to visualize urethral meatus; ask patient to cough forcefully 3–5 times; observe for leakage
- Standing (if negative supine): Patient stands with one foot elevated; repeat 3–5 coughs. Standing position increases sensitivity by ~30% — do not conclude a negative CST without standing assessment
Interpretation
| Finding | Interpretation |
|---|---|
| Immediate leakage (simultaneous with cough) | Classic SUI — sphincteric incompetence during pressure spike |
| Delayed leakage (2–10 sec after cough) | Detrusor overactivity triggered by cough — NOT SUI; manage differently |
| No leakage despite SUI history | Consider standing position; insufficient bladder volume; or urethral kinking by prolapse (see occult SUI below) |
Occult (Latent) SUI
In women with advanced anterior or apical prolapse, the prolapsed tissue may kink or compress the urethra, masking SUI that would be present once the prolapse is repaired.
Technique:
- Perform CST without reduction — patient continent (negative)
- Manually reduce the prolapse with a ring forceps, Sims speculum, or digital reduction
- Repeat CST with prolapse reduced — positive = occult SUI
:::warning Occult SUI — Surgical Counseling Occult SUI is present in approximately 40–80% of women with advanced prolapse. Pre-operative counseling must address the likelihood of post-repair stress incontinence, and concurrent anti-incontinence procedures (mid-urethral sling at time of prolapse repair) should be discussed and offered. :::
Neurological Examination of the Perineum
Perineal Sensation
Using a pin (sharp) or cotton wisp (light touch), test bilaterally:
| Dermatomal Territory | Level | Finding if Abnormal |
|---|---|---|
| Inner thigh | L2–L3 | Normal in isolated sacral lesions |
| Perineum and labia majora | S3 | Pudendal neuropathy or sacral nerve root lesion |
| Perianal region | S4–S5 | Saddle area |
| Vaginal introitus / anterior perineum | S3 | Sharp/dull discrimination |
Bilateral saddle anesthesia = cauda equina emergency until proven otherwise — requires urgent MRI spine.
Bulbocavernosus Reflex (BCR)
Arc: Dorsal clitoral nerve → pudendal nerve (S2–S4) → bulbocavernosus and external urethral sphincter.
Technique:
- Patient in lithotomy; examining finger in vagina or rectum
- Apply sharp brief squeeze/pinch to the clitoris (or tap briskly)
- Normal BCR = immediate, involuntary contraction felt around the examining finger
| Finding | Meaning |
|---|---|
| Present | Intact S2–S4 sacral arc |
| Absent | S2–S4 disruption (sacral cord, cauda equina, pudendal neuropathy) |
:::caution BCR in Normal Women The BCR can be absent in up to 30% of neurologically normal women. Absence alone, without other neurological findings, is not diagnostic of neuropathy. :::
Anal Wink Reflex (Anocutaneous Reflex)
Gently stroke perianal skin in each quadrant (12, 3, 6, 9 o'clock) with a pin or cotton swab:
| Finding | Meaning |
|---|---|
| Present wink (all quadrants) | Intact S4 arc |
| Absent one quadrant | Possible unilateral S4 / inferior hemorrhoidal nerve injury |
| Absent all quadrants | S4 disruption; associated with fecal incontinence and denervated EAS |
| Hyperreflexia (exaggerated wink) | Upper motor neuron suprasacral lesion |
Voluntary External Anal Sphincter Contraction
Ask patient to "squeeze tightly around my finger" at the anal verge. Grade 0–5. Correlates with pudendal nerve integrity and EAS bulk on endoanal ultrasound.
Documentation Template
PELVIC ORGAN PROLAPSE EXAMINATION
Position(s): □ Supine lithotomy □ Standing
Bladder volume at exam: _____ mL
Estrogen status: □ Estrogenized □ Mildly atrophic □ Severe atrophy
EXTERNAL INSPECTION:
Perineal body length: _____ cm
Genital hiatus (visual): □ Normal □ Widened
Urethral meatus: □ Normal □ Caruncle □ Prolapse □ Diverticulum suspect
Skin: □ Normal □ LS □ Lesion: _____
PROLAPSE ASSESSMENT (maximum Valsalva):
POP-Q Grid:
┌──────────┬──────────┬──────────┐
│ Aa: __ │ Ba: __ │ C: __ │
├──────────┼──────────┼──────────┤
│ gh: __ │ pb: __ │ tvl: __ │
├──────────┼──────────┼──────────┤
│ Ap: __ │ Bp: __ │ D: __ │
└──────────┴──────────┴──────────┘
POP-Q Stage: ___
LEVATOR ANI:
Resting tone: □ Hypotonic □ Normal □ Hypertonic
Modified Oxford Grade: R ___/5 L ___/5
Endurance: ___ sec Repetitions: ___ Fast: ___
Avulsion detected: □ None □ Right □ Left □ Bilateral
URETHRAL ASSESSMENT:
Q-tip resting angle: ___° Straining angle: ___°
Hypermobility (≥30°): □ Yes □ No
Suburethral mass: □ None □ Present → milking sign: □ + □ −
COUGH STRESS TEST:
Bladder volume: _____ mL
Supine: □ Negative □ Positive (immediate) □ Positive (delayed — suspect DO)
Standing: □ Negative □ Positive
With prolapse reduction: □ Not performed □ Negative □ Positive (occult SUI)
NEUROLOGICAL:
Perineal sensation: □ Intact □ Reduced R □ Reduced L □ Bilateral loss
BCR: □ Present □ Absent
Anal wink: □ Present all quadrants □ Absent: ___
Voluntary EAS squeeze: R ___/5 L ___/5
References
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Bump RC, Mattiasson A, Bo K, et al. The standardization of terminology of female pelvic organ prolapse and pelvic floor dysfunction. Am J Obstet Gynecol. 1996;175(1):10–17. PMID: 8694033
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