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Scores fetal well-being (Manning 1980) from five components — fetal breathing, gross body movement, fetal tone, amniotic fluid volume, and (in the full BPP) a non-stress test — each scored 0 or 2 for a total of 0–10. Higher scores indicate reassuring fetal status; lower scores identify fetuses at risk who warrant delivery planning.
BPP = Breathing (0/2) + Movement (0/2) + Tone (0/2) + Amniotic fluid volume (0/2) + NST (0/2) → total 0–10
8–10 normal; 6 equivocal (repeat within 24 hours); ≤ 4 abnormal (concerning, delivery planning).
The biophysical profile (Manning 1980) combines acute markers of fetal well-being (breathing, movement, tone, NST) with a chronic marker (amniotic fluid volume). Each component is scored 2 (normal) or 0 (absent/abnormal), summing to 10. A score of 8–10 is reassuring, 6 is equivocal (repeat in 24 hours), and ≤ 4 is abnormal.
Specialty
ObstetricsCategory
Obstetrics & GynecologyDifficulty
Basic
Estimated Time
30 seconds
Version
1.0
Last Updated
2026-08-16
Formula
Keywords
Normal Range
8–10 normal; 6 equivocal (repeat within 24 hours); ≤ 4 abnormal (concerning, delivery planning).
| Classification | Range |
|---|---|
Normal reassuring | 8–10 |
Equivocal repeat in 24 h | 6 |
Abnormal concerning; delivery planning | 0–4 |
Scores fetal well-being using the biophysical profile (Manning 1980): fetal breathing, gross body movement, fetal tone, amniotic fluid volume, and the non-stress test, each scored 0 or 2 for a total of 0–10.
A score of 8–10 is reassuring; 6 is equivocal and is typically repeated within 24 hours; a score of 4 or less is abnormal and warrants obstetric evaluation and delivery planning. Reduced amniotic fluid indicates chronic compromise, while the other components reflect acute fetal status.
The BPP integrates acute markers of fetal oxygenation (breathing, movement, tone, NST) with a chronic marker (amniotic fluid), providing a structured, validated antepartum surveillance tool for high-risk pregnancies.
A 36-week fetus with decreased movement shows: normal breathing (2), normal movement (2), normal tone (2), reduced amniotic fluid with SDP < 2 cm (0), and a reactive NST (2).
Inputs:
BPP 8/10 — normal, reassuring fetal status; the isolated reduced amniotic fluid warrants further evaluation for the underlying cause.
A score of 6 is equivocal. It is typically repeated within 24 hours; management depends on the indication for testing, gestational age, and the specific component(s) that were abnormal.
Amniotic fluid volume reflects chronic fetal status (weeks), while breathing, movement, tone, and the NST reflect acute status (minutes to hours).
Disclaimer: This calculator is intended for educational and clinical decision support purposes only. Fetal well-being assessment must be interpreted with the full clinical context by the managing obstetric provider.