neonatology

New Ballard Score — Gestational Age Assessment

Neuromuscular and physical maturity scoring system to estimate gestational age in neonates when dates are uncertain. Consists of 6 neuromuscular + 6 physical maturity criteria. Total score correlates to gestational age in weeks.

Posture*

Square window (wrist flexion angle)*

Arm recoil*

Popliteal angle (knee flexion)*

Scarf sign (elbow crossing midline)*

Heel to ear*

Skin texture*

Lanugo (fine hair covering body)*

Plantar surface (sole creases)*

Breast bud and areola*

Eye/ear (lids and ear cartilage)*

Genitalia maturity*

Score interpretation

Extremely / Very Preterm (<30 weeks) -10–14

Ballard score -10 to 14 — estimated gestational age <30 weeks (extremely/very preterm)

→ Level 3 NICU; surfactant therapy; respiratory support; thermoregulation; parenteral nutrition; indomethacin/ibuprofen for PDA; infection prevention; neuroprotective measures (magnesium, avoid hypoxia); family-centred care; neurodevelopmental follow-up

Preterm (30–36 weeks) 15–29

Ballard score 15–29 — estimated gestational age 30–36 weeks (preterm)

→ NICU/SCN care; respiratory monitoring; thermoregulation incubator; establish feeds (NG if unable to suck); caffeine for apnoea of prematurity; vitamin D and iron supplementation; jaundice monitoring; breastfeeding support; ophthalmology for ROP screening if <32 weeks

Term / Post-term (≥37 weeks) 30–60

Ballard score ≥30 — estimated gestational age ≥37 weeks (term or post-term)

→ Routine newborn care; ensure adequate feeding; bilirubin monitoring; newborn examination; vitamin K prophylaxis; hearing screen; metabolic screen; promote skin-to-skin; arrange GP/midwife follow-up within 5 days of discharge

Interpretation bands for the Ballard Score. Apply clinical judgement and local guidance.

References

Ballard JL et al. New Ballard Score, expanded to include extremely premature infants. J Pediatr. 1991;119(3):417–423.

Curated clinical cross-links plus same-class fallbacks.

Drugs

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.

Score interpretation

References

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