Protracted Labor, Fever, and Late Decelerations After a Prior Cesarean

No - this is not arrest of labor yet.

Active-phase arrest requires all of the following: dilation of at least 6 cm, ruptured membranes, and either ≥4 hours of adequate contractions or ≥6 hours with inadequate contractions. Rosa has the first two and her contractions are adequate (210 MVU exceeds the 200 MVU threshold), but she has been at 6 cm for only 2 hours 40 minutes. Diagnosing arrest now would be a judgment error that converts a VBAC in progress into an unnecessary repeat cesarean.

What I would do:

• Continue labor and reassess cervical change in 1–2 hours, with the caveat that her fever and fetal tracing may supersede the labor curve entirely.
• Confirm contraction adequacy continues - if MVUs drift below 200, that changes the calculus and oxytocin may be appropriate in a VBAC with continuous monitoring.
• Do not stop monitoring or leave her; her scar puts her at risk for rupture, and the recurrent late decelerations are a separate, more urgent problem.
• Document the cervical exam, MVUs, and your reasoning so that the ongoing plan is legible to the covering physician.

Reassess in real time: if recurrent late decelerations and maternal fever do not respond to resuscitation, the indication for cesarean becomes fetal status, not labor arrest.

Maternal fever 38.2 °C, ruptured membranes for 9 hours, maternal tachycardia, and fetal tachycardia with recurrent late decelerations. The most likely explanation is intrauterine infection (chorioamnionitis), with the fever and maternal acidosis contributing to fetal tachycardia and poor placental gas exchange. The recurrent late decelerations with moderate variability place her in category II - concerning but not yet acidemic.

First actions, in parallel:

• Intrauterine resuscitation: maternal repositioning, IV crystalloid bolus, stop any oxytocin, check for tachysystole, and perform fetal scalp stimulation to confirm a reassuring acceleration.
• Treat the infection: acetaminophen for fever and broad-spectrum antibiotics now (e.g., ampicillin plus gentamicin per protocol) - do not wait for cultures or for cesarean.
• Confirm the diagnosis with maternal and fetal heart rate trends, uterine tenderness, and purulent fluid if visible; the clinical picture is enough to treat.

Escalation: if late decelerations persist or worsen despite resuscitation - particularly with baseline tachycardia and loss of variability - the fetal status, not VBAC candidacy, drives the decision, and I would prepare for expedited cesarean with the OR and anesthesia notified. The differential I keep open includes dehydration/epidural-related fever, but that is a diagnosis of exclusion when membranes have been ruptured 9 hours with this tracing.

Counseling:

• The fever does not mean the VBAC has failed. Chorioamnionitis is not a contraindication to continuing labor, and many people with a low-transverse scar and this picture still deliver vaginally.
• Be honest about probabilities: with a prior low-transverse cesarean and spontaneous labor at term, roughly 60–75% achieve vaginal birth; recurrent late decelerations and infection lower that and raise the chance of cesarean.
• Explain that antibiotics treat her and reduce neonatal risk, and that she will need continued continuous monitoring because of the scar.
• Tell her what would change the plan: persistent nonreassuring fetal status, insufficient progress once she meets arrest criteria, or maternal deterioration. Ask what matters most to her so the plan reflects her priorities.

Documentation:

• The tracing interpretation, category, and times; each resuscitation measure and the fetal response.
• The antibiotic and antipyretic given, with times.
• The cervical exam and MVU data supporting the decision not to diagnose arrest.
• The shared decision-making conversation and that she was informed a repeat cesarean may become necessary for fetal indications.