PROM and PPROM nursing: NEC risk with Augmentin latency antibiotics

Premature rupture of membranes (PROM) – the spontaneous rupture of the amniotic sac before the onset of labor – complicates approximately 8% of term pregnancies, and preterm rupture complicates another 2–3% of all pregnancies, accounting for roughly a quarter to a third of preterm births. When rupture occurs before 37 weeks gestation, the condition is classified as preterm premature rupture of membranes (PPROM), and it becomes one of the most clinically complex situations a labor and delivery nurse will encounter. Management depends entirely on gestational age: at term, the priority is timely delivery; in the preterm period, the goal is to extend the pregnancy long enough for antenatal corticosteroids to mature fetal lungs while protecting both mother and fetus from infection. This reference covers the full clinical picture – from diagnosis through gestational-age-stratified management, latency antibiotics, chorioamnionitis surveillance, and the cord prolapse emergency protocol.

Quick reference: PROM and PPROM at a glance

Definitions and classification

PROM at term (≥37+0 weeks): The most common presentation. Rupture before labor but after the threshold of term. Nearly 80% of patients with PROM at term enter spontaneous labor within 12 hours and 95% within 24 hours. ACOG Practice Bulletin 217 recommends labor induction if labor does not start near the time of presentation, although a short period of expectant management (12–24 hours) may be offered when maternal and fetal status are reassuring. For GBS-positive patients, ACOG recommends immediate induction rather than expectant management. Note that ACOG’s current terminology is “prelabor” rupture of membranes; “premature” rupture of membranes remains in wide clinical and NCLEX use for the same condition.

PPROM (<37+0 weeks): The higher-stakes presentation. Occurs in 2–3% of all pregnancies in the United States and accounts for roughly a quarter to a third of preterm births. At least half of patients with PPROM give birth within 1 week of rupture, regardless of management. The management approach changes significantly based on gestational age subgroup:

• Extreme PPROM (<24+0 weeks): Periviable. Survival rates are low, and survivors have a high risk of major neurodevelopmental impairment. ACOG recommends counseling on both expectant management and immediate delivery, with neonatology and maternal–fetal medicine consultation considered. A 2025 ACOG practice advisory warns that maternal morbidity with expectant management (chorioamnionitis, hemorrhage, sepsis) is higher than older studies suggested, and patients must be told this.
• Early PPROM (24+0 to 33+6 weeks): Expectant management with antenatal corticosteroids (betamethasone), latency antibiotics, a GBS culture at presentation, and magnesium sulfate for fetal neuroprotection if delivery is anticipated before 32+0 weeks is the standard of care. Delivery is indicated for intraamniotic infection, abnormal fetal testing, or significant abruption, and is otherwise planned at 34 weeks.
• Late-preterm PPROM (34+0 to 36+6 weeks): Guidance has evolved. Delivery was traditionally recommended for everyone in this range. After the PPROMT trial (Morris, Lancet 2016) found no reduction in neonatal sepsis with immediate delivery and more respiratory distress, ACOG PB 217 now treats either expectant management or immediate delivery as reasonable after counseling, with expectant management not extending beyond 37+0 weeks. For GBS-colonized patients, ACOG recommends immediate induction rather than extended expectant management.

Prolonged ROM (≥18 hours): A time-based classification that applies regardless of gestational age. When GBS status is unknown at term, ROM of 18 hours or more is one of the risk factors that triggers intrapartum GBS prophylaxis (intravenous penicillin G or ampicillin). It does not override a negative vaginal–rectal GBS culture collected within the previous 5 weeks (ACOG Committee Opinion 797).

Diagnosis

Diagnosis should be made by sterile speculum examination – never digital vaginal examination, which increases infection risk and should be deferred until labor is established.

Pooling (amniotic fluid in the posterior fornix)

Visual confirmation of clear fluid pooling in the posterior fornix when the speculum is placed is the most reliable bedside sign. The patient may describe a sudden gush of clear fluid followed by a persistent trickle. Pooling is assessed passively – ask the patient to cough or perform a Valsalva maneuver to increase visualization. Bloody show or heavy vaginal discharge can obscure assessment.

Nitrazine test

A nitrazine (phenaphthazine) paper strip detects the pH of the vaginal fluid. Amniotic fluid usually has a pH of 7.1–7.3, while normal vaginal secretions are acidic (generally pH 3.8–4.5, per ACOG PB 217). A color change from yellow to blue-green or dark blue is a positive result.

False positives are common – this is a high-yield NCLEX point:

• Blood contamination (blood is alkaline)
• Semen (alkaline)
• Bacterial vaginosis (Gardnerella overgrowth raises vaginal pH)
• Trichomonas vaginalis infection
• Alkaline antiseptics and certain lubricants

A false positive nitrazine result in the setting of one of these conditions does not confirm ROM. Correlation with pooling and ferning is required. False negatives also occur when rupture is prolonged and little fluid remains.

Ferning (arborization)

Amniotic fluid allowed to dry on a glass slide forms a fern-like crystallization pattern under microscopy – this is the arborization pattern caused by the sodium chloride and proteins in amniotic fluid. Cervical mucus also produces ferning (particularly at ovulation), so false positives occur if the sample is contaminated with cervical mucus. False negatives can occur if the sample is contaminated with blood or if the fluid has been present for more than a few hours (ferning degrades).

AmniSure (PAMG-1)

AmniSure detects placental alpha microglobulin-1 (PAMG-1), a protein found in high concentrations in amniotic fluid and in very low concentrations in normal vaginal secretions. Manufacturer and validation studies report high sensitivity, but ACOG PB 217 notes false-positive rates of 19–30% in patients whose membranes were clinically intact. In 2018 the FDA warned clinicians, after reports including 15 fetal deaths, that rupture-of-membranes tests must not be used on their own to diagnose ROM. Treat a result as one input alongside the speculum exam and clinical picture.

AmniSure is particularly useful when:

• The nitrazine and ferning results are discordant
• Significant blood contamination makes nitrazine interpretation unreliable
• Clinical suspicion is high but speculum exam is negative

Ultrasound – oligohydramnios

Ultrasound assessment of amniotic fluid volume (AFI or single deepest pocket) can support the diagnosis of ROM. Oligohydramnios (AFI ≤5 cm or single deepest pocket <2 cm) in the context of a suspected ROM history is strongly supportive. However, ultrasound cannot confirm ROM – oligohydramnios has other causes (placental insufficiency, fetal urinary abnormalities, post-dates pregnancy), and a normal fluid volume does not rule out a small or slow leak.

When tests conflict

If pooling is clearly seen, diagnosis is confirmed regardless of nitrazine or fern results. If pooling is absent and nitrazine is positive in the setting of known risk factors for false positives (blood, BV, Trichomonas), an amniotic protein test such as AmniSure may help. A negative AmniSure in a patient with a convincing history but no pooling and a positive nitrazine is a clinical judgment call – many providers will admit for monitoring and repeat assessment. In equivocal cases that remain unresolved, ACOG describes ultrasound-guided transabdominal instillation of indigo carmine dye as an option, though dye shortages have limited its use.

Complications and risks

Management by gestational age

The core decision in PPROM management is always the same: does the risk of continuing the pregnancy (infection, cord prolapse, placental abruption) outweigh the risk of delivering the neonate at the current gestational age? At term, delivery wins. In the preterm period, the calculus depends on gestational age and the presence or absence of infection.

Latency antibiotics

Latency antibiotics extend the latency period – the time between membrane rupture and delivery – by reducing subclinical amniotic infection that otherwise accelerates labor. The landmark evidence comes from the NICHD MFMU Network trial (Mercer et al., JAMA 1997), which established the standard protocol used today.

Standard latency antibiotic protocol (PPROM 24–33+6 weeks):

1. Ampicillin 2 g IV q6h × 48 hours plus erythromycin 250 mg IV q6h × 48 hours
2. Followed by: amoxicillin 250 mg PO q8h × 5 days plus erythromycin base 333 mg PO q8h × 5 days

Total course: 7 days.

Why amoxicillin-clavulanate (Augmentin) is avoided: The ORACLE I trial (Kenyon et al., Lancet 2001; 4,826 women) found that co-amoxiclav, alone or with erythromycin, prolonged pregnancy but gave no benefit on the primary neonatal outcome and was associated with a significantly higher rate of necrotizing enterocolitis (NEC). The authors concluded co-amoxiclav “cannot be routinely recommended” for PPROM, and ACOG PB 217 states that amoxicillin–clavulanic acid is not recommended. Erythromycin alone was the arm that showed neonatal benefit. NEC is a catastrophic gastrointestinal emergency in preterm neonates. The 7-year follow-up of the same cohort found no childhood benefit from any of the antibiotic arms to offset that harm. Do not substitute amoxicillin-clavulanate for plain amoxicillin in the latency regimen. This is a classic and frequently tested NCLEX point.

Erythromycin alternatives: ACOG accepts azithromycin (for example, a single 1 g oral dose) in place of erythromycin when erythromycin is unavailable or not tolerated.

In penicillin-allergic patients: ACOG CO 797 suggests a first-generation cephalosporin (cefazolin IV, then cephalexin orally) for low-risk or unknown allergy histories, and clindamycin or azithromycin when the risk of anaphylaxis is high, guided by GBS susceptibility results. The nurse should clarify the specific penicillin allergy type (rash only vs anaphylaxis) before administration and confirm the provider-ordered alternative.

What latency antibiotics achieve: In the Mercer trial (614 women at 24–32 weeks), antibiotics reduced the composite of fetal or infant death, respiratory distress, severe IVH, NEC, or early sepsis (44.1% vs 52.9%), reduced NEC (2.3% vs 5.8%), and significantly prolonged pregnancy in GBS-negative women. ACOG summarizes the benefit as prolonging pregnancy, reducing maternal and neonatal infection, and reducing gestational-age-dependent morbidity.

Chorioamnionitis

Chorioamnionitis (intraamniotic infection) – infection and inflammation of the amniotic fluid, membranes, placenta, or decidua – is the most dangerous maternal complication of PPROM and the condition most likely to force delivery regardless of gestational age. ACOG PB 217 reports clinically evident intraamniotic infection in 15–35% of PPROM cases and postpartum infection in about 15–25%, with higher rates at earlier gestational ages.

Diagnosis

ACOG Committee Opinion 712 defines suspected intraamniotic infection as either:

• Maternal temperature ≥39.0°C, or
• Maternal temperature 38.0–38.9°C plus at least one additional clinical risk factor: maternal leukocytosis (WBC >15,000 cells/µL), purulent cervical drainage, or fetal tachycardia (sustained >160 bpm)

A temperature of 38.0–38.9°C with no other finding is classified as isolated maternal fever; ACOG advises considering antibiotics unless another source is identified and documented, and the fever should always be reported to the neonatal team. Uterine tenderness, foul-smelling fluid, and maternal tachycardia are supporting signs that should be reported, though they are not part of the ACOG definition. Confirmed infection requires an amniotic fluid test or placental pathology.

Important caveat: Betamethasone administration causes a transient leukocytosis, typically within 24 hours of the first dose. Do not interpret a post-betamethasone leukocytosis alone as evidence of chorioamnionitis. Correlate with temperature and other signs.

Management

Once intraamniotic infection is diagnosed in a patient with PPROM:

1. Delivery – PB 217 lists intraamniotic infection as an indication for delivery at any gestational age, and expectant management stops. The route is decided by standard obstetric indications; CO 712 states that intraamniotic infection alone is rarely, if ever, an indication for cesarean.
2. Antibiotics – broad-spectrum intrapartum regimen with GBS coverage: ampicillin 2 g IV q6h plus gentamicin 1.5 mg/kg IV q8h (or 5 mg/kg IV q24h once-daily dosing). If cesarean is performed, add clindamycin 900 mg IV q8h (or metronidazole) for anaerobic coverage.
3. Do not continue antibiotics automatically postpartum. After vaginal birth they may not be needed; after cesarean, CO 712 recommends at least one additional dose, with longer courses guided by risk factors such as bacteremia or persistent fever.
4. Neonatal team notification – neonates born to mothers with suspected intraamniotic infection need evaluation and enhanced surveillance for early-onset sepsis.

Neonatal implications

Neonates exposed to chorioamnionitis have elevated rates of early-onset sepsis, pneumonia, meningitis, intraventricular hemorrhage, periventricular leukomalacia, and cerebral palsy. The neonatal team should be present at delivery or immediately available when chorioamnionitis is diagnosed.

Cord prolapse emergency management

Cord prolapse is an obstetric emergency. Compression of the umbilical cord between the presenting part and the maternal pelvis causes acute fetal hypoxia. Every minute matters. The nursing response must be immediate and coordinated.

Stepwise emergency response:

1. Call for help immediately – activate the emergency response (pull cord, call code, notify charge nurse, call provider STAT).
2. Reposition the patient – knee-chest position, or left lateral with head-down tilt (Trendelenburg). Both positions use gravity to move the presenting part away from the cord.
3. Manually elevate the presenting part – with a sterile gloved hand inserted into the vagina, apply upward pressure on the presenting part to relieve cord compression. Maintain this pressure continuously until the operating room team takes over. If the decision-to-delivery interval may be long, the provider may instead fill the bladder with 500–750 mL of saline via catheter (emptied again before cesarean).
4. Do not attempt to replace the cord – RCOG Green-top Guideline 50 finds insufficient evidence for manual replacement and does not support it outside a trial. Handle any loops outside the vagina as little as possible to prevent vasospasm. Wrapping the cord in warm saline-soaked gauze is common practice but of unproven benefit.
5. Oxygen only if indicated – supplemental oxygen is common in older protocols, but ACOG CPG No. 10 (2025) recommends against routine maternal oxygen for Category II or III tracings in the absence of maternal hypoxia. Follow your unit protocol and give oxygen for maternal hypoxia.
6. Continuous FHR monitoring – maintain fetal heart rate monitoring throughout transport to the OR. The provider may order a tocolytic (terbutaline 0.25 mg subcutaneously) for persistent FHR abnormalities while the OR is prepared.
7. Inform the patient and family – brief, clear communication (“The cord has come out ahead of the baby; we need to do an emergency cesarean to protect the baby”).
8. Urgent cesarean section – the definitive treatment, with birth targeted within 30 minutes of decision. Vaginal birth may be attempted only if the cervix is fully dilated and birth can be accomplished quickly and safely.

An internal link to the obstetric nursing reference has additional context on fetal heart rate monitoring and priority interventions in labor and delivery.

Nursing assessment priorities

Initial assessment on admission for suspected ROM

• Sterile speculum exam – confirm pooling; collect nitrazine, ferning, and culture swabs (GBS if not already done). Do not perform a digital vaginal exam until labor is established.
• Fetal heart rate – continuous electronic fetal monitoring on admission. Assess for variable decelerations (cord compression), late decelerations (uteroplacental insufficiency), or fetal tachycardia (infection).
• Gestational age confirmation – review dating ultrasound; accurate GA is the foundation of all management decisions.
• GBS status – review prenatal records; if GBS-positive or unknown, initiate prophylaxis per protocol.
• Contraction pattern – are contractions present? Frequency, duration, intensity.
• Fluid color and odor – clear and odorless is reassuring. Green (meconium) or foul-smelling raises immediate concern.
• Baseline vitals and labs – temperature, pulse, BP, CBC, CRP if available.

Ongoing monitoring in expectant management (PPROM)

• Temperature every 4 hours – escalate immediately if ≥38.0°C.
• Continuous or intermittent FHR monitoring – frequency per gestational age and unit protocol. Most centers use continuous monitoring for the first 12–24 hours and transition to intermittent if the patient is stable.
• Daily fetal movement counts – kick counts; non-stress test (NST) or biophysical profile (BPP) as ordered.
• CBC every 48–72 hours – rising WBC or left shift supports infection.
• Contraction monitoring – increasing contraction frequency may indicate evolving labor or infection.
• Amniotic fluid assessment – any change in odor or color reported immediately.
• Maternal tachycardia – a new maternal heart rate >100 bpm in a patient with PPROM is an infection signal until proven otherwise.

Nursing assessment findings connect directly to the content in the nursing lab values cheat sheet – CBC interpretation and CRP trending are core skills here.

Patient education

Patients with PPROM being managed expectantly will often be hospitalized for days to weeks. Clear education reduces anxiety and helps patients recognize warning signs.

Pelvic rest: No sexual intercourse, no tampons, and no digital vaginal self-examination. Anything introduced vaginally increases infection risk through open membranes.

Activity: Limited activity as ordered. Once the pregnancy is viable, ACOG recommends hospitalization rather than home care for PPROM. The patient should know the specific mobility restrictions and why they exist (reduce cord prolapse risk, reduce labor stimulation).

Signs requiring immediate notification:

• Fever or chills
• Foul-smelling vaginal discharge or amniotic fluid
• Increase in fluid leakage or change in fluid color (green = meconium)
• Painful contractions or pelvic pressure
• Decreased fetal movement – instruct the patient to perform kick counts and report fewer than 10 movements in 2 hours
• Visible cord or tissue at the vaginal opening – immediately lie down and call for help

Prognosis and NICU counseling: If PPROM is early, parents need honest information about neonatal outcomes at their gestational age. Connect with the neonatal nurse practitioner or neonatologist early. Parents who understand the NICU course – possible ventilator support, feeding tubes, prolonged hospitalization – are better prepared and more resilient. See the neonatal nursing reference for NICU care priorities.

Emotional support: PPROM is terrifying for patients. Acknowledge the fear, provide clear information at each shift, and avoid false reassurance. Explaining what you are monitoring for and why helps patients feel active rather than passive in their care.

NCLEX high-yield points

1. Digital vaginal exams are contraindicated with PROM and PPROM until active labor is established. Sterile speculum exam is the correct initial assessment. This distinction is tested frequently.

2. Nitrazine false positives: Blood, semen, bacterial vaginosis, and Trichomonas all produce false-positive nitrazine results. If any of these are present, confirm with ferning or AmniSure before acting on the nitrazine result alone.

3. Amoxicillin-clavulanate (Augmentin) is avoided in PPROM latency antibiotic protocols because it was associated with more necrotizing enterocolitis (NEC) in neonates in the ORACLE I trial, and ACOG does not recommend it. Plain amoxicillin is used instead.

4. Intraamniotic infection with PPROM is an indication for delivery at any gestational age. Expectant management stops once clinical chorioamnionitis is diagnosed. Delivery does not automatically mean cesarean; the route follows standard obstetric indications.

5. Betamethasone causes transient leukocytosis. Do not interpret a raised WBC as chorioamnionitis in the 24–48 hours following a dose unless it comes with fever or other signs (fetal tachycardia, purulent or foul-smelling fluid, uterine tenderness).

6. Cord prolapse: do not replace the cord. The correct action is to manually elevate the presenting part and maintain pressure continuously until cesarean birth. Handle any exposed cord as little as possible, because manipulation causes vasospasm.

7. ROM of 18 hours or more is a GBS risk factor only when GBS status is unknown. A patient with a negative vaginal–rectal culture within the previous 5 weeks does not need GBS prophylaxis for prolonged ROM alone. A GBS-positive patient needs prophylaxis whatever the duration of rupture.

8. The latency regimen lasts 7 days (48 hours IV ampicillin plus erythromycin, then 5 days oral amoxicillin plus erythromycin). Its purpose is to prolong pregnancy and reduce maternal and neonatal infection and prematurity-related morbidity, which gives the betamethasone course (2 doses, 24 hours apart) time to take effect.

9. PPROM at 34–36+6 weeks: ACOG PB 217 accepts either expectant management (up to 37+0 weeks) or immediate delivery after counseling, a shift from older guidance that recommended delivery for everyone. GBS-colonized patients should be induced promptly.

10. Temperature monitoring every 4 hours is a common nursing surveillance interval for chorioamnionitis in expectant PPROM management. Increase the frequency when clinical concern is elevated.

Related resources

• Obstetric nursing reference – labor stages, fetal heart rate interpretation, priority OB interventions
• Preterm labor nursing – tocolytics, antenatal corticosteroids, cervical length screening
• Preeclampsia and eclampsia nursing – magnesium sulfate monitoring, hypertensive emergency management
• Postpartum hemorrhage nursing – uterotonic medications, hemorrhage quantification, emergency response
• Neonatal nursing reference – NICU priorities, respiratory support, preterm neonatal assessment
• Nursing lab values cheat sheet – CBC interpretation, CRP trending, electrolytes in the obstetric patient

References

1. American College of Obstetricians and Gynecologists. ACOG Practice Bulletin No. 217: Prelabor Rupture of Membranes. Obstet Gynecol. 2020;135(3):e80–e97. doi:10.1097/AOG.0000000000003700. Reaffirmed 2026. (Supersedes Practice Bulletin No. 188, 2018, which replaced No. 172, 2016. ACOG now uses “prelabor” rather than “premature” rupture of membranes.)
2. Mercer BM, Miodovnik M, Thurnau GR, et al. Antibiotic therapy for reduction of infant morbidity after preterm premature rupture of the membranes. NICHD MFMU Network. JAMA. 1997;278(12):989–995. doi:10.1001/jama.1997.03550120049032.
3. Kenyon SL, Taylor DJ, Tarnow-Mordi W; ORACLE Collaborative Group. Broad-spectrum antibiotics for preterm, prelabour rupture of fetal membranes: the ORACLE I randomised trial. Lancet. 2001;357(9261):979–988. doi:10.1016/S0140-6736(00)04233-1.
4. American College of Obstetricians and Gynecologists. Committee Opinion No. 713: Antenatal Corticosteroid Therapy for Fetal Maturation. Obstet Gynecol. 2017;130(2):e102–e109. doi:10.1097/AOG.0000000000002237. Reaffirmed 2024.
5. Mercer BM. Preterm premature rupture of the membranes. Obstet Gynecol. 2003;101(1):178–193. doi:10.1016/s0029-7844(02)02366-9.
6. Lorthe E, Torchin H, Delorme P, et al. Preterm premature rupture of membranes at 22–25 weeks’ gestation: perinatal and 2-year outcomes within a national population-based study (EPIPAGE-2). Am J Obstet Gynecol. 2018;219(3):298.e1–298.e14. doi:10.1016/j.ajog.2018.05.029.
7. American College of Obstetricians and Gynecologists. Committee Opinion No. 797: Prevention of Group B Streptococcal Early-Onset Disease in Newborns. Obstet Gynecol. 2020;135(2):e51–e72. doi:10.1097/AOG.0000000000003668. Reaffirmed 2025.
8. Romero R, Espinoza J, Chaiworapongsa T, Kalache K. Infection and prematurity and the role of preventive strategies. Semin Neonatol. 2002;7(4):259–274. doi:10.1053/siny.2002.0121.
9. Redline RW. Classification of placental lesions. Am J Obstet Gynecol. 2015;213(4 Suppl):S21–28. doi:10.1016/j.ajog.2015.05.056.
10. Tita AT, Andrews WW. Diagnosis and management of clinical chorioamnionitis. Clin Perinatol. 2010;37(2):339–354. doi:10.1016/j.clp.2010.02.003.
11. Kenyon S, Pike K, Jones DR, et al. Childhood outcomes after prescription of antibiotics to pregnant women with preterm rupture of the membranes: 7-year follow-up of the ORACLE I trial. Lancet. 2008;372(9646):1310–1318. doi:10.1016/S0140-6736(08)61202-7.
12. Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe’s Obstetrics: Normal and Problem Pregnancies. 8th ed. Philadelphia, PA: Elsevier; 2021.
13. American College of Obstetricians and Gynecologists. Committee Opinion No. 712: Intrapartum Management of Intraamniotic Infection. Obstet Gynecol. 2017;130(2):e95–e101. doi:10.1097/AOG.0000000000002236. Reaffirmed 2025.
14. Goldenberg RL, Culhane JF, Iams JD, Romero R. Epidemiology and causes of preterm birth. Lancet. 2008;371(9606):75–84. doi:10.1016/S0140-6736(08)60074-4.
15. Medina TM, Hill DA. Preterm premature rupture of membranes: diagnosis and management. Am Fam Physician. 2006;73(4):659–664.
16. Morris JM, Roberts CL, Bowen JR, et al. Immediate delivery compared with expectant management after preterm pre-labour rupture of the membranes close to term (PPROMT trial): a randomised controlled trial. Lancet. 2016;387(10017):444–452. doi:10.1016/S0140-6736(15)00724-2.
17. American College of Obstetricians and Gynecologists. Practice Advisory: Increased Risk of Maternal Morbidity Associated With Previable and Periviable Preterm Prelabor Rupture of Membranes. May 2025. acog.org (accessed October 5, 2026).
18. Royal College of Obstetricians and Gynaecologists. Umbilical Cord Prolapse. Green-top Guideline No. 50. November 2014 (reviewed December 2024 and extended).
19. US Food and Drug Administration. FDA alerts healthcare providers, women about risks associated with improper use of rupture of membranes tests. Press announcement and Letter to Health Care Providers, August 2018.
20. American College of Obstetricians and Gynecologists. Clinical Practice Guideline No. 10: Intrapartum Fetal Heart Rate Monitoring: Interpretation and Management. Obstet Gynecol. 2025;146(4):583–599. doi:10.1097/AOG.0000000000006049.