Eduovisual
Pregnancy, Childbirth & Puerperium
Preterm premature rupture of membranes
— Contrast with PROM (rupture at term before labor) and prolonged ROM (>18 hours before delivery, term or preterm).
— "Latency period" = interval from membrane rupture to delivery; inversely related to gestational age at rupture.
— Complicates ~2–4% of all pregnancies but accounts for ~30% of preterm births.
— Major driver of neonatal morbidity: prematurity, sepsis, respiratory distress syndrome (RDS), intraventricular hemorrhage, and pulmonary hypoplasia (especially with very early PPROM <24 weeks).
— Pregnant patient <37 weeks reporting a sudden gush of fluid or persistent watery vaginal leakage.
— Continuous dampness on a perineal pad that is clear/pale yellow, sometimes blood-tinged or meconium-stained.
— New-onset vaginal pressure, decreased fetal movement, or fever in a known preterm gravida.
— Prior PPROM or prior preterm birth (strongest)
— Genitourinary infection: BV, GC/CT, GBS bacteriuria, UTI
— Short cervix, cervical insufficiency, prior cervical surgery (LEEP, cone)
— Antepartum bleeding, abruption, polyhydramnios, multiple gestation
— Smoking, low BMI, low socioeconomic status, connective tissue disease (Ehlers-Danlos)
— Triggers a time-sensitive bundle: confirm rupture → assess gestational age → rule out infection/abruption/labor → decide expectant vs delivery → start latency antibiotics, steroids, and (if appropriate) magnesium for neuroprotection.
Step 3 management: The instant PPROM is confirmed, your CCS clock starts — admit, continuous fetal monitoring, GBS-aware antibiotics, betamethasone if 24⁰⁄₇–33⁶⁄₇ weeks, and magnesium sulfate if <32 weeks. Do not perform a digital cervical exam unless delivery is imminent — it shortens latency and worsens chorioamnionitis risk.
— "I felt a pop and a gush of warm fluid down my legs."
— Followed by ongoing intermittent leakage with positional changes, coughing, or Valsalva.
— Some patients describe only persistent dampness mistaken for urinary incontinence or increased physiologic discharge.
— Timing of rupture (exact time/date) → drives latency calculations and antibiotic timing.
— Color: clear/straw = typical amniotic fluid; green/brown = meconium (concerning at <37 weeks, suggests fetal stress or listeriosis); bloody = think abruption; purulent/foul = chorioamnionitis.
— Volume: single gush vs continuous trickle vs only on standing.
— Associated symptoms: contractions, vaginal bleeding, fever/chills, decreased fetal movement, dysuria, pelvic pressure.
— Confirm gestational age by best obstetric estimate (LMP + earliest ultrasound — first-trimester CRL is gold standard).
— Prior PPROM, preterm birth, cervical procedures, or cerclage in place.
— Group B Strep (GBS) status from current pregnancy (35–37 wk culture); if unknown and <37 wk → treat empirically as GBS-positive.
— Recent intercourse, vaginal exams, or amniocentesis (can mimic or trigger rupture).
— STI exposure, BV symptoms, recent UTI
— Maternal fever ≥39.0°C once, or ≥38.0°C sustained → chorioamnionitis criteria
— Sickle cell, lupus, anticoagulation, diabetes (alters latency tolerance and infection risk)
Key distinction: Differentiate amniotic fluid from urine (ammoniacal smell, only with Valsalva, dipstick mostly negative for protein) and from leukorrhea/cervicitis (white, mucoid, not pooling). Amniotic fluid is alkaline (pH 7.1–7.3), ferns on a slide, and pools in the posterior fornix.
Board pearl: A "gush" with subsequent oligohydramnios on ultrasound in a 30-week gravida is PPROM until proven otherwise — never anchor on UTI just because urinalysis shows trace leukocytes.
— Maternal temperature ≥39.0°C once OR ≥38.0–38.9°C sustained over 30 min with ≥1 of: maternal/fetal tachycardia, fundal tenderness, purulent discharge, leukocytosis → intraamniotic infection (Triple I / chorioamnionitis).
— Maternal tachycardia >100, fetal tachycardia >160, hypotension → think infection or hemorrhage.
— Fundal height vs gestational age (sudden decrease suggests fluid loss).
— Uterine tenderness between contractions → chorioamnionitis or abruption.
— Palpate for contraction frequency and tone (board-like rigidity → abruption).
— Leopold maneuvers for presentation (breech is more common in PPROM and changes delivery planning).
— Avoid digital exam unless labor is active or delivery imminent.
— Visualize pooling of clear fluid in the posterior fornix (most specific sign).
— Ask patient to Valsalva or cough → watch for fluid escape from the cervical os.
— Inspect cervix for dilation, effacement, visible membranes, prolapsed cord, or umbilical cord/extremity (emergency).
— Obtain swabs for GBS, GC/CT, BV/trich while sterile speculum is in.
— Nitrazine test: swab posterior fornix; turns blue at pH >6.5 (false positives: blood, semen, BV).
— Ferning: air-dry swab on slide → arborization pattern under microscopy (false negatives if dry or contaminated with cervical mucus).
— Continuous EFM (non-stress test) for at least 30 min: assess baseline, variability, accelerations, decelerations.
— Bedside ultrasound: amniotic fluid index (AFI <5 cm or single deepest pocket <2 cm supports rupture), presentation, estimated fetal weight, placenta location, biophysical profile if NST equivocal.
CCS pearl: On a Step 3 CCS case, order in this order — vitals → continuous fetal monitoring → sterile speculum exam → bedside ultrasound for AFI/presentation. Skipping speculum and going straight to digital exam is a classic "wrong move" deduction.
— Pooling (most specific, ~100% PPV when seen)
— Nitrazine positive (alkaline pH; sensitivity ~90%, false positives with blood, semen, BV, antiseptics)
— Ferning (sensitivity ~85–98%; air-dry the slide ≥10 min; false negatives if cervical mucus contamination)
— Any 2 of 3 → diagnosis confirmed.
— Oligohydramnios (AFI <5 cm or MVP <2 cm) supports diagnosis but is not specific (renal agenesis, IUGR also cause it).
— Confirm gestational age, fetal weight, presentation, placental location, anatomy (especially renal anatomy if oligohydramnios is severe early).
— Look for cervical funneling/length if clinically uncertain (transvaginal).
— CBC with differential — baseline WBC; trend if expectant management.
— CRP — can trend, but nonspecific in pregnancy.
— Type & screen, Rh status — RhoGAM if Rh-negative.
— Urinalysis and urine culture — UTI is both a mimicker and a precipitant.
— GBS culture (if not already done in this pregnancy).
— GC/CT NAAT, wet mount, BV testing if not recent.
— HIV, syphilis, HBsAg if not documented this pregnancy.
— Continuous EFM initially, then at least daily NST or BPP during expectant management.
— Category I tracing reassuring; Category II/III → escalate workup for infection or abruption.
— WBC >15,000 with left shift + fever + uterine tenderness → diagnose chorioamnionitis → deliver regardless of GA.
— Positive urine culture → treat the UTI (don't blame UTI for the rupture).
Board pearl: Nitrazine false positives are a classic distractor — if the patient also has bacterial vaginosis or blood-tinged discharge, rely on pooling and ferning. Conversely, a profound oligohydramnios picture on ultrasound after an equivocal speculum strongly supports PPROM.
Step 3 management: Order CBC, urinalysis/culture, GBS, GC/CT, type & screen, ultrasound, and continuous EFM as your standing initial bundle for any suspected PPROM.
— Persistent suspicion despite negative speculum (intermittent leak, late presentation, recent intercourse contaminating nitrazine) → use biochemical marker assays.
— PAMG-1 (AmniSure) — placental alpha-microglobulin-1; sensitivity ~99%, specificity ~88–100%; not affected by semen, urine, or BV.
— IGFBP-1 (Actim PROM) — insulin-like growth factor binding protein-1; similar performance; can be affected by blood.
— Use as adjuncts, not replacements, for the clinical trifecta.
— Caveat: False positives can occur in late labor or with recent vaginal exam; false negatives if rupture >12 hours prior with resealing.
— Transabdominal amniocentesis with indigo carmine dye (avoid methylene blue — risk of fetal methemoglobinemia).
— Place tampon; blue staining within 30 min → confirms rupture.
— Reserved for >32 weeks with persistent diagnostic uncertainty when management hinges on the answer.
— If chorioamnionitis suspected clinically but ambiguous → amniocentesis for Gram stain, glucose (<14 mg/dL suggests infection), WBC, and culture.
— Most centers manage clinically rather than tap, but Step 3 may test the criteria.
— Renal ultrasound of fetus if oligohydramnios is severe and rupture not confirmed → rule out renal agenesis (Potter sequence).
— Doppler studies if IUGR coexists.
— Always re-confirm using earliest available dating ultrasound — first-trimester CRL within 7 days is gold standard.
— Late dating (≥22 wk) carries ±2 week error and can change steroid and delivery decisions.
Key distinction: A positive PAMG-1 with normal AFI still confirms rupture — don't dismiss the diagnosis because fluid hasn't dropped yet. Conversely, oligohydramnios without confirmed rupture is not PPROM — consider IUGR, renal anomalies, or post-dates.
Board pearl: Indigo carmine is the dye of choice for amnio-dye test — methylene blue is contraindicated due to fetal hemolytic anemia and methemoglobinemia.
— Proceed with delivery (induction usually appropriate).
— Risk of infection/abruption with expectant management outweighs prematurity risk.
— GBS prophylaxis per status; no steroids if ≥34⁰⁄₇ unless within an individualized late-preterm steroid protocol (34⁰⁄₇–36⁶⁄₇ may receive betamethasone if delivery anticipated within 7 days and no prior course).
— Expectant management if no infection, abruption, labor, or non-reassuring fetal status.
— Administer betamethasone (course of 2 doses 24 h apart) + latency antibiotics + GBS prophylaxis.
— Magnesium for neuroprotection if <32 weeks at the time of decision.
— Deliver at 34 0/7 weeks or sooner for complications.
— Expectant management strongly favored.
— Betamethasone, magnesium sulfate (neuroprotection), latency antibiotics.
— Inpatient admission, daily NST/BPP, surveillance for chorio.
— Deliver at 34 0/7 weeks if stable.
— Counseling-driven: discuss neonatal survival/morbidity, pulmonary hypoplasia risk, maternal sepsis risk.
— Options: expectant outpatient management until viability, or induction of labor.
— Antenatal corticosteroids can be considered from 22 0/7 weeks if resuscitation planned.
— Chorioamnionitis (intraamniotic infection)
— Placental abruption with maternal/fetal compromise
— Non-reassuring fetal status (Category III tracing)
— Cord prolapse
— Active labor that cannot be safely arrested
Step 3 management: Memorize the bundle by GA — <32 wk: steroids + mag + abx + expectant; 32–33⁶⁄₇: steroids + abx + expectant; ≥34: deliver + GBS prophylaxis.
— Indicated for PPROM <34 weeks with expectant management.
— Standard 7-day regimen (ACOG):
— IV ampicillin 2 g q6h + IV erythromycin 250 mg q6h × 48 hours, then
— Oral amoxicillin 250 mg q8h + oral erythromycin 333 mg q8h × 5 days.
— Azithromycin 1 g PO once is an acceptable substitute for erythromycin (better tolerated, equivalent efficacy, increasingly preferred).
— Avoid amoxicillin-clavulanate — associated with necrotizing enterocolitis in neonates.
— Penicillin allergy: cefazolin-based or clindamycin + gentamicin based on severity.
— Betamethasone 12 mg IM q24h × 2 doses (preferred) or dexamethasone 6 mg IM q12h × 4 doses.
— Indicated 24 0/7 – 33 6/7 weeks; consider 22 0/7–23 6/7 if resuscitation planned.
— Late preterm course (34 0/7 – 36 6/7): betamethasone if delivery expected within 7 days AND no prior course (note: in PPROM ≥34 wks, delivery is usually pursued — so this is situational).
— Rescue course: single repeat if prior course was ≥14 days ago, current GA <34 wks, and delivery anticipated within 7 days.
— Indicated when delivery anticipated within 24 hours at <32 weeks.
— Reduces cerebral palsy risk in survivors.
— Dose: 4–6 g IV loading over 20–30 min, then 1–2 g/hr until delivery or 24 h.
— Monitor reflexes, respirations, urine output; antidote = calcium gluconate.
— Once labor or delivery is imminent, penicillin G 5 million units IV load, then 2.5–3 million q4h until delivery.
— Cefazolin if low-risk PCN allergy; clindamycin (if susceptible) or vancomycin if anaphylactoid.
Board pearl: Amoxicillin-clavulanate is the wrong antibiotic in PPROM — NEC risk in the neonate. Use ampicillin + (azithromycin or erythromycin).
Step 3 management: The PPROM bundle = steroids + latency abx + magnesium (if <32 wk) + GBS prophylaxis at delivery.
— PPROM itself is not an indication for cesarean.
— Vaginal delivery preferred when fetal status reassuring and presentation favorable.
— Cesarean for standard obstetric indications: non-reassuring fetal status, malpresentation (e.g., footling breech preterm), prior classical incision, placenta previa, cord prolapse.
— At ≥34 weeks with PPROM and unfavorable cervix: induce with oxytocin (preferred) or prostaglandins (misoprostol/dinoprostone) per Bishop score.
— Avoid mechanical balloon ripening in confirmed rupture due to theoretical infection risk (controversial).
— If cerclage is in place at time of PPROM → management is individualized.
— Most evidence supports removal at diagnosis to reduce infection; some centers retain briefly to complete steroid course.
— Definitely remove if chorioamnionitis, labor, or non-reassuring tracing.
— Short course (≤48 h) of nifedipine or indomethacin only to complete steroid course or facilitate transfer at <32 wk.
— Contraindicated with chorio, abruption, or non-reassuring fetal status.
— Indomethacin avoided ≥32 wk (ductus arteriosus closure, oligohydramnios worsening).
— Multidisciplinary: MFM, neonatology, ethics.
— Discuss survival without major morbidity (~30–50% at 23 wk in tertiary centers; varies).
— Decision points: resuscitation vs comfort care, antenatal steroids, cesarean for fetal indications, magnesium.
— Generally not recommended. Inpatient surveillance is standard until delivery.
— Highly selected previable PPROM cases with reaccumulating fluid and no infection may be considered for outpatient with strict return precautions.
— Amnioinfusion during labor: may help variable decelerations from cord compression in oligohydramnios; not standard antepartum.
— Amniopatch (platelets + cryoprecipitate) for iatrogenic PPROM post-amniocentesis — experimental.
CCS pearl: When chorioamnionitis is diagnosed, your next orders are broad-spectrum antibiotics (ampicillin + gentamicin; add clindamycin/metronidazole if cesarean) AND delivery — do not delay delivery for steroids or transport.
— Higher baseline infection risk → lower threshold to suspect chorio.
— Steroids transiently worsen hyperglycemia for 3–5 days — anticipate insulin scale up-titration; do not withhold steroids for diabetes alone.
— Monitor glucose q2–4h during steroid course.
— Magnesium for neuroprotection overlaps with seizure prophylaxis dosing — coordinate so you don't double-dose.
— Severe features → delivery threshold lowers regardless of PPROM bundle.
— Magnesium is renally cleared → reduce infusion rate (often 1 g/hr) and monitor serum Mg, DTRs, respirations, and urine output more frequently.
— Toxicity at Mg >7 mEq/L (loss of reflexes), >10 (respiratory depression), >12 (cardiac arrest); antidote calcium gluconate 1 g IV.
— Adjust ampicillin/cefazolin doses if CrCl reduced.
— Erythromycin can worsen cholestasis → prefer azithromycin for latency.
— Monitor LFTs if extended antibiotic course.
— Magnesium can cause hypotension and reduced contractility; titrate carefully in cardiomyopathy or valvular disease.
— Tocolytics: avoid nifedipine in low-EF states; avoid beta-agonists (terbutaline) in tachyarrhythmias.
— PPROM management is similar, but at term/near-term ROM, route of delivery depends on viral load:
— VL <1000: vaginal delivery acceptable.
— VL ≥1000 or unknown: cesarean at 38 wk traditionally — but with PPROM, decisions individualized; continue ART and add IV zidovudine intrapartum if VL ≥1000.
— Hydrate carefully (avoid overload), maintain oxygenation, transfuse to Hb ~10 if anticipating delivery; higher infection susceptibility.
— Higher chorioamnionitis and wound infection risk; weight-based antibiotic dosing essential (cefazolin 3 g if >120 kg for cesarean prophylaxis).
Key distinction: Steroid-induced hyperglycemia is transient and should never delay a guideline-indicated betamethasone course in PPROM — manage glucose, don't skip steroids.
Step 3 management: In renal impairment + magnesium therapy, check Mg level at 4–6 hours, monitor DTRs and RR hourly, and keep calcium gluconate at bedside.
— Higher baseline PPROM rate.
— Rupture is typically of the presenting sac; the other(s) may remain intact.
— Same GA-based management bundle; monovs di-/triamniotic status affects monitoring intensity.
— Delivery timing slightly earlier (DCDA twins routinely 36–37 wk anyway, so threshold to deliver after PPROM is similar to singletons at any given GA).
— Counseling cornerstone: MFM + neonatology + ethics + family.
— Outcomes: maternal chorioamnionitis ~30%, endometritis, sepsis, abruption; neonatal survival low and morbid.
— Pulmonary hypoplasia risk rises with rupture <20 wk and prolonged anhydramnios — major cause of neonatal mortality.
— Antenatal corticosteroids may be offered from 22 0/7 wk if family elects resuscitation; magnesium per local protocol.
— Latency antibiotics may be started at viability threshold (commonly 23 wk).
— Termination is an option to discuss; expectant management with outpatient follow-up another.
— Document shared decision-making thoroughly.
— Higher rates of STIs, BV, and PPROM; screen aggressively.
— Confidentiality nuances: in most US states, minors can consent to prenatal care and STI treatment without parental involvement; check state law.
— Engage social work for psychosocial support and contraception planning postpartum.
— Iatrogenic ruptures after genetic amnio (~1% risk) often reseal with conservative management — bedrest, pelvic rest, surveillance; outcomes generally favorable.
— Cerclage-associated PPROM: remove cerclage in most cases at rupture.
— Once labor begins or induction starts, start intrapartum penicillin immediately; latency antibiotics (ampicillin) cover GBS during expectant management, but restart full GBS prophylaxis at delivery.
Board pearl: PPROM <20 weeks with prolonged anhydramnios → pulmonary hypoplasia + Potter-like limb deformities are the dreaded outcomes; this drives the periviable counseling discussion.
Key distinction: Iatrogenic post-amniocentesis PPROM has a substantially better prognosis than spontaneous PPROM at the same GA, often resealing within 1–2 weeks.
— Chorioamnionitis (Triple I) — 15–35% with expectant management; risk rises with latency duration and digital exams.
— Endometritis — postpartum, more common with chorio and cesarean.
— Placental abruption — 4–12% (decidual hemorrhage from sudden decompression).
— Maternal sepsis — rare but a leading cause of maternal mortality from PPROM.
— Retained placenta and postpartum hemorrhage.
— Cesarean delivery rate increases (malpresentation, fetal intolerance).
— Prematurity-related: RDS, IVH, NEC, retinopathy of prematurity, BPD, sepsis, death.
— Cord prolapse — emergency, more likely with non-cephalic presentation and low amniotic fluid.
— Cord compression — variable decelerations from oligohydramnios.
— Pulmonary hypoplasia — devastating outcome of very early PPROM (<24 wk) with anhydramnios >2 wk.
— Skeletal/positional deformities (Potter sequence-like) — clubfoot, contractures.
— Neonatal sepsis / early-onset GBS / E. coli infection.
— Hypoxic-ischemic encephalopathy from abruption or cord prolapse.
— Longer latency → reduced prematurity morbidity but higher chorio risk.
— Optimal "sweet spot" of expectant management: complete steroid course (48 h), reach 34 wk if possible.
— Neurodevelopmental delay risk tracks with GA at delivery, not PPROM per se.
— Cerebral palsy reduced ~30% by magnesium neuroprotection in those born <32 wk.
— Maternal recurrence risk in next pregnancy ~15–32%.
— Chorioamnionitis, abruption with hemodynamic instability or non-reassuring tracing, cord prolapse, Category III FHR tracing, advanced labor.
Board pearl: Pulmonary hypoplasia is the unique catastrophic complication of early, prolonged anhydramnios — counsel families about this when PPROM occurs <24 weeks with AFI persistently near 0.
Step 3 management: Document every shift: maternal temp, pulse, fundal tenderness, fetal heart rate, contraction pattern, and any new bleeding — these are your early-warning data points for the "must deliver now" decision.
— All PPROM <34 weeks.
— Periviable PPROM for shared counseling.
— Multiples, prior classical cesarean, cerclage in place, suspected placenta accreta spectrum.
— Antenatal counseling for any anticipated preterm delivery <34 wk (especially <28 wk).
— Family meeting before delivery to align on resuscitation plan.
— Early epidural placement consideration in patients with anticipated need for urgent operative delivery (thrombocytopenia, obesity, difficult airway).
— Septic shock from chorioamnionitis with hypotension despite fluids → vasopressors, broad-spectrum antibiotics, source control (delivery).
— DIC from abruption with PPROM.
— ARDS from sepsis or aspiration.
— Pulmonary edema from tocolytics (especially terbutaline, magnesium overdose).
— If currently at facility without NICU capable of GA at expected delivery (Level III/IV for <32 wk).
— Transfer before delivery is safer for neonate than postnatal transfer.
— Stabilize with steroids, magnesium, antibiotics; ideally transport during a 48-h tocolysis window.
— Chorioamnionitis at any GA
— Abruption with maternal or fetal compromise
— Cord prolapse → STAT cesarean
— Category III FHR tracing unresponsive to intrauterine resuscitation
— Active labor that cannot be safely arrested
— GA ≥34 weeks (routine, planned)
— Maternal SBP <90 or MAP <65, RR >24, SpO₂ <94%, lactate >2, altered mental status.
— Apply qSOFA/sepsis-in-pregnancy criteria with low threshold.
CCS pearl: On a CCS case of suspected PPROM at 29 weeks at a community hospital without NICU, stabilize (steroids, mag, abx) and transfer — choosing "transfer to tertiary care" earns points; delaying transfer until delivery does not.
Key distinction: Tocolysis is never appropriate when chorioamnionitis or abruption is suspected — it delays the only definitive treatment (delivery).
— Stress incontinence very common in pregnancy due to bladder displacement.
— Triggered by cough/sneeze; ammoniacal odor; nitrazine usually negative; no ferning; no pooling on speculum.
— Bladder ultrasound and urinalysis help differentiate.
— Increased white/mucoid discharge in pregnancy; not watery, no pooling.
— Wet mount unremarkable.
— Thin gray discharge with fishy odor; nitrazine positive (false-positive trap), but no pooling, no ferning.
— Clue cells on wet mount, positive whiff test.
— Frothy yellow-green (trich) or thick white "cottage cheese" (candida).
— Speculum reveals discharge but no pooling of clear fluid.
— Thick blood-tinged mucus near term/preterm labor; not watery; not nitrazine alkaline (mucus).
— Indicates cervical change but not rupture.
— Bleeding rather than fluid leakage, but can mimic blood-tinged amniotic fluid.
— Localized fluid discharge from a vulvar site; speculum exam differentiates.
— Post-coital pooling; nitrazine positive, can fern (false positive); history clarifies.
— High leak (hindwater) may produce intermittent trickle and diagnostic ambiguity; ultrasound oligohydramnios + PAMG-1 helpful.
— Forewater rupture is the classic gush.
Key distinction: Nitrazine + with no pooling and no ferning → think BV, blood, or semen contamination, not PPROM. Always anchor on pooling as the most specific finding, and use PAMG-1 if uncertain.
Board pearl: A patient with a "leak" who reports it only with coughing and laughter, has a positive UA for nitrite/leuks, and shows no pooling on speculum likely has stress incontinence + UTI, not PPROM — but still rule out rupture with PAMG-1 if leak persists.
— Painful vaginal bleeding (sometimes concealed), uterine tenderness, hypertonus, fetal distress.
— May co-occur with PPROM.
— Coagulopathy/DIC in severe cases.
— Management: depends on GA and stability, often delivery.
— Painless bright-red bleeding in 2nd/3rd trimester.
— Avoid digital exam; transvaginal ultrasound diagnostic.
— Not amniotic fluid, but mistaken for "fluid" by patients.
— Painless bleeding with rupture of membranes → fetal exsanguination.
— Look for sinusoidal fetal heart pattern; STAT cesarean.
— Regular contractions causing cervical change without rupture.
— Sterile speculum negative for pooling; treat with tocolysis, steroids, magnesium per GA.
— Painless cervical dilation in 2nd trimester; membranes may still be intact and bulging.
— Rescue cerclage if appropriate; if membranes already ruptured, no cerclage.
— Can both mimic (urinary leakage perception) and precipitate PPROM/preterm labor.
— Treat with cephalexin, nitrofurantoin (avoid near term), or IV ceftriaxone for pyelo.
— Fever, uterine tenderness, fetal/maternal tachycardia without confirmed leak.
— Rare but possible (intraamniotic infection with high membranes); treat as Triple I.
— AFI low without rupture; rehydration restores fluid.
— Severe oligohydramnios without rupture; diagnosed on detailed fetal anatomy ultrasound.
Key distinction: Painless bleeding + ROM = vasa previa until proven otherwise — fetal mortality without immediate delivery exceeds 50%.
Board pearl: When a Step 3 stem describes oligohydramnios but no rupture history, no pooling, and no positive PAMG-1 → look for fetal renal anomalies (Potter sequence) or uteroplacental insufficiency / IUGR.
— Monitor for postpartum endometritis — fever, fundal tenderness, foul lochia; treat with clindamycin + gentamicin until afebrile 24–48 h.
— DVT prophylaxis if cesarean or prolonged bedrest.
— Lactation support (preterm infants in NICU often need pumping protocol — start within 6 hours).
— Rh-negative mothers: anti-D 300 mcg if not already given antepartum and infant Rh-positive.
— Document antenatal steroid timing, magnesium duration, intrapartum antibiotics, GBS status, and any concern for chorio for NICU team.
— Cord blood gases and placental pathology if chorio suspected.
— Counsel on 18-month interpregnancy interval to reduce recurrent preterm birth risk.
— Options: LARC (IUD, implant) safe immediately postpartum; progestin-only methods compatible with breastfeeding.
— Avoid combined estrogen contraceptives until 6 wk postpartum, longer in VTE risk.
— Prior spontaneous preterm birth (including prior PPROM):
— 17-OHPC (Makena) was historically standard but withdrawn from US market (2023) after efficacy concerns; consult current ACOG guidance.
— Vaginal progesterone for short cervix (<25 mm before 24 wk) in singleton with prior PTB.
— Cervical length surveillance every 2 wk starting at 16 wk through 24 wk.
— Cerclage if short cervix + prior spontaneous PTB.
— Smoking cessation, BV/UTI screening and treatment, optimize chronic conditions before next conception.
— Folic acid 400 mcg/day preconception minimum.
— Address postpartum depression at 6-week visit (Edinburgh scale or PHQ-9).
— Cardiometabolic screening if preeclampsia or GDM coexisted.
— Detailed discharge summary specifying GA at PPROM, GA at delivery, complications, neonatal outcome, and recommendations for next pregnancy.
Step 3 management: A patient with prior PPROM at 30 wk presenting preconception → counsel on short interpregnancy interval avoidance, smoking cessation, early prenatal care, serial cervical length ultrasounds, and vaginal progesterone if short cervix.
Board pearl: 17-OHPC is no longer recommended in US practice as of 2023 — Step 3 has updated to emphasize vaginal progesterone + cervical length surveillance ± cerclage.
— 2-week visit if cesarean or complicated delivery (incision check, BP, mood).
— Comprehensive postpartum visit at 4–6 weeks: contraception, mood, recovery, breastfeeding, return to activity.
— Extended postpartum care up to 12 weeks ("4th trimester") per ACOG.
— Screen for postpartum depression and PTSD — preterm delivery and NICU admission are major risk factors.
— Refer to support groups (March of Dimes, NICU parent networks).
— NICU graduates need high-risk infant follow-up clinic at 4, 8, 12, 18, 24 months corrected age — neurodevelopmental, growth, vision (ROP), hearing screens.
— Synagis (palivizumab) for RSV prophylaxis in eligible preemies during RSV season.
— Immunizations on chronological age, not corrected.
— Discuss the etiology if known (infection, short cervix, abruption); often idiopathic.
— Provide written summary for future obstetric care providers.
— Recurrence risk ~15–32% for PPROM/PTB.
— Begin prenatal care early in next pregnancy (≤10 wk ideally).
— Initiate vaginal progesterone at 16–20 wk if prior spontaneous preterm birth.
— Transvaginal cervical length every 2 weeks from 16–24 weeks.
— Cerclage if cervical length <25 mm and prior spontaneous PTB <34 wk.
— Smoking cessation (counseling + nicotine replacement if needed; varenicline/bupropion not recommended in pregnancy).
— Treat periodontal disease and BV proactively.
— Optimize diabetes, hypertension, thyroid before conception.
— Confirm insurance coverage for serial ultrasounds, progesterone, NICU follow-up.
— Care coordinator for high-risk OB referrals.
Step 3 management: At the 6-week postpartum visit after PPROM at 31 weeks → screen PHQ-9, discuss 18-month interpregnancy interval, place a LARC if desired, and refer to MFM for preconception consultation before the next pregnancy.
Board pearl: Preterm infants follow immunization schedules by chronological age at full doses — do not adjust for prematurity (except hepatitis B in infants <2 kg, which requires modified scheduling).
— Highly nuanced shared decision-making — parents must understand survival rates, risk of severe disability, maternal sepsis risk, and option of comfort care.
— Document discussions thoroughly with MFM and neonatology present.
— Respect patient autonomy: a patient may decline resuscitation at 22–23 weeks; conversely, a patient may request full resuscitation — both can be ethically appropriate within institutional guidelines.
— Patient may refuse hospitalization, steroids, or antibiotics.
— Maintain therapeutic alliance, document capacity assessment, offer alternatives, schedule close follow-up, and avoid coercion.
— Maternal autonomy generally supersedes presumed fetal interests in US law (no court-ordered cesareans in nearly all cases).
— Universal screening for intimate partner violence at prenatal visits; PPROM presentation is a chance to re-screen.
— Substance use: positive toxicology may trigger state reporting laws (varies); know your state.
— Suspected child abuse (rare in this context but applicable if other children at risk).
— Handoffs between L&D, antepartum, and NICU teams are high-risk for medication errors — use structured handoff (I-PASS, SBAR).
— Reconcile antibiotic regimens, GBS prophylaxis timing, last steroid dose, and last magnesium dose at every transfer.
— Transfer to tertiary care: ensure receiving team has antenatal records, recent labs, and consent for transport.
— Most cases are resolvable through counseling.
— Court intervention rare and ethically discouraged; rely on ethics consultation when needed.
— Minors generally can consent to prenatal care; balance confidentiality with safety (e.g., suspected sexual abuse triggers reporting).
— Time of rupture, time of each intervention (steroids, mag, antibiotics) — these data drive neonatal management decisions.
— Document shared decision-making for all expectant management decisions, especially periviable.
— Use ACOG/SMFM maternal sepsis bundle when chorioamnionitis with hypotension occurs.
— Massive transfusion protocol readiness for abruption-associated PPROM.
Step 3 management: A 23-week PPROM patient who declines resuscitation for her infant — your role is to confirm decisional capacity, ensure understanding, involve MFM and neonatology, document the discussion, and respect her choice while offering comfort-focused care.
— PPROM = 2–4% of pregnancies, ~30% of preterm births.
— Latency antibiotic regimen: ampicillin + erythromycin (or azithromycin) × 7 days.
— Betamethasone: 12 mg IM q24h × 2 doses; window 24⁰⁄₇–33⁶⁄₇ wk (consider 22⁰⁄₇ if resuscitation planned; late preterm 34⁰⁄₇–36⁶⁄₇ situational).
— Magnesium neuroprotection threshold: <32 weeks.
— Delivery threshold: 34 0/7 weeks (or earlier for complications).
— Recurrence risk: 15–32%.
— "Fern pattern under microscope" → amniotic fluid
— "Pooling in posterior fornix" → most specific PPROM sign
— "Nitrazine paper turns blue" → alkaline pH, supports rupture (beware BV/blood/semen false positives)
— "Indigo carmine instilled into amniotic cavity" → gold-standard dye test (not methylene blue!)
— "Amoxicillin-clavulanate" in PPROM → NEC risk (wrong answer)
— "Pulmonary hypoplasia + clubbed feet + flat facies" → previable PPROM, Potter-like sequence
— "Cord compression variable decels" → oligohydramnios after PPROM
— "Foul-smelling amniotic fluid + maternal fever + uterine tenderness" → chorioamnionitis → deliver
— "Sinusoidal FHR + bleeding with ROM" → vasa previa
— "Calcium gluconate at bedside" → magnesium toxicity antidote
— Amoxicillin-clavulanate (NEC)
— Methylene blue dye (fetal methemoglobinemia)
— Indomethacin ≥32 wk (ductal closure)
— Terbutaline >48 h (FDA black box: maternal cardiac events)
— Digital cervical exam (shortens latency, increases infection) — unless delivery imminent or active labor.
— PPROM alone is not an indication for cesarean.
Board pearl: Triad to deliver immediately at any GA: chorioamnionitis, abruption with instability, or non-reassuring fetal tracing. Memorize these three triggers — they override the expectant management bundle.
Key distinction: Magnesium dosing for neuroprotection (<32 wk PPROM) and preeclampsia seizure prophylaxis is similar (4–6 g load, 1–2 g/h) — coordinate so you don't stack regimens.
"A 28-year-old G2P1 at 30 weeks reports a sudden gush of clear fluid. Speculum exam shows pooling in the posterior fornix. Nitrazine paper turns blue. AFI is 4 cm. What is the next step?"
→ Answer: Admit, continuous fetal monitoring, betamethasone, ampicillin + azithromycin, magnesium sulfate, GBS prophylaxis at delivery.
"At 28 weeks PPROM, which antibiotic regimen is contraindicated?"
→ Answer: Amoxicillin-clavulanate (necrotizing enterocolitis risk).
"PPROM at 30 weeks. After 4 days of expectant management, patient develops T 39°C, HR 118, fetal HR 175, fundal tenderness. WBC 22k. Next step?"
→ Answer: Delivery + broad-spectrum antibiotics (ampicillin + gentamicin ± clindamycin). Do not wait for steroid course.
"32-week gravida reports intermittent leakage; speculum shows no pooling, nitrazine negative, ferning negative. AFI 6 cm. Best next step to confirm or refute rupture?"
→ Answer: PAMG-1 (AmniSure) or IGFBP-1 immunoassay.
"PPROM at 35 0/7 weeks, no infection, reassuring tracing. Best management?"
→ Answer: Proceed with delivery (induction); GBS prophylaxis; betamethasone is generally not indicated at ≥34 0/7 because delivery is pursued.
"PPROM at 21 weeks. What is the most important next step?"
→ Answer: Multidisciplinary counseling with MFM and neonatology on outcomes, options (expectant management vs induction), and risks (pulmonary hypoplasia, chorio).
"PPROM at 28 weeks on magnesium infusion. Patient has absent DTRs, RR 8. Next step?"
→ Answer: Stop magnesium and administer calcium gluconate 1 g IV.
"Suspected PPROM at 30 weeks. Which exam should be avoided?"
→ Answer: Digital cervical exam.
"Patient with prior PPROM at 30 weeks now preconception. What intervention reduces recurrent PTB risk?"
→ Answer: Cervical length surveillance from 16–24 wk; vaginal progesterone if short cervix; cerclage if short cervix + prior spontaneous PTB.
"PPROM with breech, AFI 3 cm. Sudden severe variable decel. Pelvic exam reveals palpable cord."
→ Answer: Elevate presenting part, knee-chest or Trendelenburg, STAT cesarean.
Board pearl: Step 3 favors stems that bundle multiple decisions — read the question to identify GA, infection status, and fetal status before choosing the answer set.
PPROM = rupture of membranes before 37 weeks and before labor; management hinges on gestational age, infection status, and fetal well-being — with a bundle of steroids, latency antibiotics, magnesium neuroprotection, and timed delivery.
— <32 wk: betamethasone + magnesium + ampicillin/azithromycin × 7 days + expectant.
— 32–33⁶⁄₇ wk: betamethasone + latency antibiotics + expectant to 34 wk.
— ≥34 wk: deliver with GBS prophylaxis.
Step 3 management: When you see PPROM on a CCS or stem — clock starts. Order continuous EFM, sterile speculum, ultrasound for AFI/presentation, CBC, GBS, urine culture, type & screen, then deliver the bundle by gestational age: steroids, magnesium (if <32 wk), latency antibiotics (ampicillin + azithromycin), GBS prophylaxis at delivery, and watch hourly for the three triggers (chorio, abruption, fetal distress) that mean "deliver now." On discharge, plan postpartum contraception with LARC, 18-month interval counseling, MFM preconception referral, and a vaginal progesterone + cervical length plan for the next pregnancy. That is the complete Step 3 picture of PPROM in one breath.
Board pearl: If you remember only three numbers — 34 weeks (delivery threshold), 32 weeks (magnesium threshold), 7 days (latency antibiotic duration) — you can solve nearly every PPROM stem on the exam.