Population‐specific validation of fetal weight formulas: Evidence from a multicenter near‐delivery cohort

Sumito Nagasaki; Rio Suzuki; Fumio Sugo; Mayu Tachihara; Tsubasa Mori; Sena Shimizu; J. Sakuma; Ayumu Ito; Mayumi Takano; Masahiko Nakata

doi:10.1111/aogs.70278

June 9, 2026Acta Obstetricia Et Gynecologica ScandinavicaOpen Access

Population‐specific validation of fetal weight formulas: Evidence from a multicenter near‐delivery cohort

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Key Points

To compare the accuracy of a population-specific fetal weight formula with a global model in near-delivery pregnancies.
Secondary analysis of a prospective cohort study.
Fetal ultrasound measurements obtained by certified sonographers in Japan.
Primary analysis involved examinations within 7 days before delivery.
Shinozuka formula median signed error was -75.8 g, while Hadlock-3 was -223.3 g (p < 0.001).
83.9% of estimates from Shinozuka were within ±10% of birth weight compared to 61.6% for Hadlock-3 (p < 0.001).
In the small for gestational age subgroup, Shinozuka showed significantly lower errors than Hadlock-3.

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Implication

This secondary analysis compares fetal weight estimation formulas in near-delivery pregnancies, suggesting better accuracy for a population-specific model.

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Cite This Study

Nagasaki et al. (2026) studied this question.

synapsesocial.com/papers/6a2ba4778101cf8926f02e7d https://doi.org/10.1111/aogs.70278

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Population‐specific validation of fetal weight formulas: Evidence from a multicenter near‐delivery cohort

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Population‐specific validation of fetal weight formulas: Evidence from a multicenter near‐delivery cohort

Key Points

No abstract yet

Implication

Discussion

Cite This Study

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