Guide — Maternal-Newborn
Antepartum Fetal Surveillance Nursing Care
These tests answer one question: is the fetus getting enough oxygen? The trick is keeping the “good news” word straight for each — reactive NST and negative CST are both reassuring — and knowing the nursing care around each.
9 min read · Maternal-Newborn
Educational use only. Test selection, interpretation, and obstetric decisions are provider-directed and follow current obstetric guidelines and facility protocols. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Overview
Antepartum surveillance assesses fetal well-being and oxygenation before labor, used in pregnancies at higher risk (diabetes, hypertension, postdates, decreased movement, growth restriction). A healthy, well-oxygenated fetus shows an intact autonomic nervous system — heart-rate accelerations with movement, reflex movements, tone, and breathing. The tests look for those signs of well-being; their strength is in their reassuring (normal) results, which strongly predict that the fetus is fine in the short term.
Key Concepts
Kick counts (fetal movement counting)
The simplest, patient-performed screen. A common teaching: lie on the side after a meal and count movements — about 10 movements within 2 hours is reassuring. A noticeable decrease in movement is a warning sign to report for further testing.
Nonstress test (NST) — reactive is good
External monitoring of FHR for accelerations with fetal movement; no contractions induced. Reactive (normal) = at least 2 accelerations in 20 minutes (term criterion: ≥15 beats above baseline lasting ≥15 seconds). Nonreactive means the criteria aren’t met — often just a sleeping fetus, so use vibroacoustic stimulation or extend the test, then proceed to further evaluation (BPP/CST).
Contraction stress test (CST) — negative is good
Evaluates how the FHR responds to contractions (nipple stimulation or oxytocin). Negative (normal) = no late decelerations with contractions — reassuring. Positive (abnormal) = late decelerations with most contractions, suggesting uteroplacental insufficiency. CST is contraindicated when labor is unwanted (e.g., placenta previa, prior classical cesarean, preterm labor risk).
Biophysical profile (BPP) & amniotic fluid
Ultrasound assessment of 4 components — fetal breathing, gross body movement, tone, and amniotic fluid volume — plus the NST, each scored 0 or 2 (max 10). 8–10 is reassuring; 6 is equivocal; ≤4 is concerning and prompts delivery considerations. Amniotic fluid index (AFI) reflects chronic placental function: low (oligohydramnios) suggests insufficiency; high (polyhydramnios) has its own causes. Amniocentesis samples fluid for genetic testing or fetal lung maturity.
Assessment Findings
For monitoring tests, position the patient in a side-lying (or semi-Fowler’s with a hip wedge) position to avoid supine hypotension, obtain a baseline FHR and maternal vitals, and identify accelerations, decelerations, and contractions. Recognize the reassuring patterns (reactive NST, negative CST, BPP 8–10) versus the nonreassuring ones (late decelerations, BPP ≤4, decreased fluid). After amniocentesis, monitor the FHR and for complications: bleeding, leaking fluid, contractions, fever, or decreased fetal movement. For an Rh-negative patient undergoing amniocentesis, anticipate Rho(D) immune globulin.
Nursing Priorities
Set up and interpret monitoring correctly
Position to avoid supine hypotension, apply the monitor, and read results against the criteria. A nonreactive NST often just means a sleeping fetus — try stimulation before assuming the worst — but never ignore truly nonreassuring findings.
Respond to nonreassuring results
For late decelerations or low BPP, apply intrauterine resuscitation as appropriate (reposition to left side, oxygen, IV fluids, stop oxytocin) and notify the provider promptly — these tests escalate to closer monitoring or delivery decisions.
Provide periprocedure care for amniocentesis
Confirm informed consent, ensure an empty/appropriately full bladder per protocol and ultrasound guidance, monitor FHR before and after, and give Rho(D) immune globulin to Rh-negative patients. Teach the post-procedure warning signs.
Support the anxious patient
These tests are ordered because something is “higher risk,” which is frightening. Explain why the test is being done and what the results mean before, during, and after.
Therapeutic Communication Considerations
Fetal testing carries enormous emotional weight — a parent hears “we need to check the baby” as “something is wrong.” Explain the purpose in plain terms and emphasize what a reassuring result means. Avoid offering false reassurance or interpreting beyond your scope, but do relieve unnecessary alarm (a nonreactive NST commonly just reflects fetal sleep). For genetic amniocentesis, acknowledge the difficult decisions that results may bring and support — without steering — whatever the family chooses. Be present during waiting periods, which feel long and uncertain.
Patient & Family Education
Teach kick counts as an everyday self-monitoring tool and exactly when to call for decreased movement. Explain each ordered test simply — the NST is painless and just listens; the CST briefly causes contractions; the BPP is an ultrasound that scores well-being. Reinforce that reassuring results (reactive NST, negative CST, BPP 8–10) are good news, and that further testing after an unclear result is routine, not a crisis. After amniocentesis, teach the patient to report vaginal bleeding, fluid leakage, contractions, fever, or decreased fetal movement, and to rest as advised. Encourage questions and connect families to genetic counseling when relevant.
NCLEX Pearls
- ✦REACTIVE NST = reassuring (≥2 accelerations of ≥15 bpm × ≥15 sec in 20 min); nonreactive often just means a sleeping fetus.
- ✦NEGATIVE CST = reassuring (no late decelerations); POSITIVE CST = late decelerations = uteroplacental insufficiency.
- ✦Memory aid: the 'bad-sounding' words are the GOOD results — reactive and negative are both reassuring.
- ✦BPP scores 5 parameters (breathing, movement, tone, fluid, NST) ×2 = max 10; 8–10 reassuring, ≤4 concerning.
- ✦Kick counts: ~10 movements in 2 hours is reassuring; decreased movement must be reported.
- ✦After amniocentesis: monitor FHR, watch for bleeding/leaking fluid/contractions/fever, and give Rho(D) immune globulin if Rh-negative.
Related Resources
Standards & sources
Fact-checked Jun 20, 2026This page is written to align with American College of Obstetricians and Gynecologists (ACOG) · AWHONN · American Academy of Pediatrics (AAP) — newborn. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →