Maternity and newborn
Preterm labor
NCLEX preterm labor chapter: PTL signs, activity and hydration, tocolytics overview, betamethasone for fetal lungs, mag sulfate neuroprotection cues, and when to go in.
Clesial Editorial TeamReviewed by Clesial Editorial Team, Clinical Content Review
Contents7 sections
Preterm labor items test whether you can spot early cues, buy fetal maturity time, and know when home advice is over. Bleeding catastrophes sit in Maternity emergencies. Oxytocin and detailed maternity drug dosing sit in Maternity and newborn medications.
Recognizing preterm labor
Labor before 37 weeks risks neonatal lung disease, infection, and neuro morbidity. Clients may minimize symptoms because contractions feel like menstrual cramps or backache. Teach a concrete list: regular tightenings, pelvic pressure, dull low back pain that comes and goes, menstrual-like cramps, increased discharge, or fluid leak. Cervical change on exam confirms the diagnosis; your triage teaching gets them in before that exam can happen.
| Cue | Teaching / action |
|---|---|
| Regular contractions before 37 weeks | Time them; call/go in if they persist |
| Gush or trickle of fluid | Assume ROM until evaluated — go in |
| Vaginal bleeding | Emergency evaluation — not home rest alone |
| Decreased fetal movement | Same-day evaluation |
At home, ordered activity reduction, side-lying rest, hydration, and voiding can quiet some irritable uteri driven by dehydration. If contractions continue, or if the client has risk history (prior PTB, multiples, infection cues), evaluation beats another hour of wishful waiting.
- Avoid sexual intercourse when PTL precautions are ordered — prostaglandin and orgasm can stimulate the uterus.
- Treat UTI symptoms seriously; infection is a common PTL trigger.
- Do not promise that rest always stops labor — honesty keeps clients seeking care.
Tocolytics and antenatal corticosteroids
Tocolysis is often a bridge, not a cure. The point on many stems is to delay birth long enough for corticosteroid benefit and safe transfer to a center with NICU care. Drug choice varies; nursing focuses on maternal vital signs, contraction pattern, and drug-specific adverse effects. Terbutaline patterns emphasize maternal tachycardia and feeling of racing heart; nifedipine patterns emphasize hypotension and headache; indomethacin patterns emphasize gestation limits and fetal concerns as tested.
- Give betamethasone IM as scheduled (typical two-dose pattern as ordered).
- Explain: helps fetal lungs make surfactant readiness — baby may still need NICU, but severity can lessen.
- Continue maternal/fetal monitoring while steroids are on board.
If the stem shows contraindications to delaying birth — abruption with instability, chorioamnionitis, or other “get the baby out” cues — tocolysis is the wrong priority. Stabilize mother, prepare for delivery, and involve the neonatal team.
Safety
Bleeding, fever with foul fluid, or nonreassuring fetal status: stop thinking “buy time” and move to emergency obstetric pathways.
Magnesium sulfate neuroprotection and when to go in
In indicated early preterm windows, magnesium sulfate is given for fetal neuroprotection (reducing cerebral palsy risk patterns as tested), which is a different primary purpose than using mag only as a tocolytic. Maternal nursing is the same vigilance: respiratory rate, deep tendon reflexes, urine output, and mentation. Toxicity progresses from loss of reflexes to respiratory depression. Keep calcium gluconate available per protocol and stop the infusion when toxicity appears.
| Finding on mag | Action |
|---|---|
| RR low / hard to arouse | Stop mag; support airway; antidote pathway |
| Reflexes absent | Toxicity — stop infusion; notify provider |
| Urine output falling sharply | Hold/notify — excretion impaired |
| Flushing, mild warmth (common) | Monitor; teach expected effect vs danger signs |
Hospital thresholds to teach: contractions that do not calm with rest/hydration, any bleeding, suspected rupture of membranes, severe pain, fever, or fetal movement change. When in doubt on a stem, evaluation in triage is safer than coaching the client to stay home through progressive labor.
Priority map
| Situation | First move |
|---|---|
| <37 weeks + regular contractions at home | Rest/hydrate/void once; go in if they continue |
| PTL admitted, birth likely in 48 h | Antenatal corticosteroids as ordered |
| Early preterm + mag infusing, RR 10 | Stop mag; airway; calcium gluconate pathway |
| PTL + heavy bleeding / rigid uterus | Maternity emergency pathway — not tocolysis focus |
| Fluid leak + fever | Evaluate infection; delivery planning as indicated |
Revision
Must know
- 1Preterm labor: regular contractions with cervical change before 37 weeks — teach clients to report rhythmic pain, pelvic pressure, backache, or leaking fluid, not wait for “real labor.”
- 2First-line home cues often include rest as ordered, hydration, and emptying the bladder — dehydration and full bladder can irritate the uterus; these do not replace evaluation when contractions persist.
- 3Tocolytics (as tested: nifedipine, terbutaline, mag, indomethacin patterns) may buy time for steroids and transfer — watch drug-specific SE (tachycardia, hypotension, respiratory depression with mag).
- 4Betamethasone (or dexamethasone) IM as ordered accelerates fetal lung maturity — teach that the goal is neonatal respiratory benefit, not stopping labor forever.
- 5Magnesium sulfate for fetal neuroprotection in early preterm windows as tested: monitor RR, reflexes, urine output, and level of consciousness; calcium gluconate is the classic antidote cue.
- 6Go to the hospital for persistent contractions, bleeding, ruptured membranes, decreased fetal movement, or when teaching thresholds in the stem are met — do not “tough it out” at home.
- 7Contraindications to delaying birth (severe bleeding, chorioamnionitis, fetal demise patterns as tested) change the plan — stabilize and deliver rather than chase tocolysis.
- 8Hemorrhage emergencies (abruption, previa) live in maternity emergencies; oxytocin induction/augmentation rules live in maternity and newborn medications.
Memory hooks
Steroids for the lungs, not the calendar
Antenatal corticosteroids buy fetal lung maturity while the team manages timing of birth.
Mag watches: RR, reflexes, urine
Magnesium toxicity looks like slowing breathing, lost reflexes, and low output — stop infusion and get the antidote pathway.
Pressure, backache, leaks — call
PTL is not only knife-like contractions; pelvic pressure and fluid leaks need evaluation.
How it's tested
Stems ask which symptom sends a pregnant client in, why betamethasone is given, what to monitor on mag, or which finding means stop tocolysis and move toward delivery. Distractors treat PTL as false labor forever, skip steroid teaching, or ignore mag toxicity cues.
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