ArticleActa obstetricia et gynecologica Scandinavica2023
Accuracy and precision of sonographic fetal weight estimation in Sweden.
Article in Acta obstetricia et gynecologica Scandinavica, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06456957 (Fetal Abdominal Subcutaneous Tissue Thickness in Prediction of Fetal Weight in Term Pregnant Women), which is not on this map. Cited by 14 papers, 1 of them a synthesis that pooled it.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Fetal Abdominal Subcutaneous Tissue Thickness in Prediction of Fetal Weight in Term Pregnant Women: A Prospective Cohort Study
Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.
- Accuracy and clinical effectiveness of fetal growth monitoring strategies for the prediction of small for gestational age at birth: a systematic review and meta-analysis.Health technology assessment (Winchester, England) · 2025Pooled it
- Development of Novel Prenatal Prediction Models for Birth-Weight Estimation in Low-Risk Third-Trimester Pregnancies.Biomedicines · 2026Article
- Population-specific validation of fetal weight formulas: Evidence from a multicenter near-delivery cohort.Acta obstetricia et gynecologica Scandinavica · 2026Article
- Temporal trends in estimated fetal weight accuracy following national guideline implementation: a six-year cohort study at a tertiary center in Southern China (2014-2019).BMC pregnancy and childbirth · 2026Article
- The role of sonographic estimated fetal weight compared to clinical assessment: superior accuracy only in extreme fetal weight cases.BMC pregnancy and childbirth · 2026Article
- Mid-pregnancy psychosocial distress and the risk of third-trimester small-for-gestational-age fetuses: a prospective cohort study in coastal Indonesia.Frontiers in psychiatry · 2026Article
- Timing of First Cuddling After Preterm Birth Improved Over Five Decades, While Delays Were Linked to Negative Maternal Experiences.Acta paediatrica (Oslo, Norway : 1992) · 2026Article
- A balancing act: Primary care midwives screening for fetal growth restriction- a focus group study.International journal of nursing studies advances · 2025Article
- Stillbirth in Iceland 1996-2021: Incidence and etiology.Acta obstetricia et gynecologica Scandinavica · 2025Article
- The Fetal Region-specific Optimized Growth Standard (FROGS)-A fetal and birthweight centile calculator validated in a national population.PLoS medicine · 2025Article
- Importance of antenatal identification of small for gestational age fetuses on perinatal and childhood outcomes: A register-based cohort study.Acta obstetricia et gynecologica Scandinavica · 2024Article
- Accuracy and precision of sonographic fetal weight estimation in Sweden.Acta obstetricia et gynecologica Scandinavica · 2023Article
- Ultrasound-based machine learning models for assisting the prediction of neonatal size and mode of delivery.Therapeutic advances in reproductive healthArticle
- Article
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
Abstract
introductionFetal growth assessment by ultrasound is an essential part of modern obstetric care. The formula by Persson and Weldner for estimated fetal weight (EFW), used in Sweden since decades, has not yet been evaluated. The objective of this study was to evaluate accuracy and precision of the formula by Persson and Weldner, and to compare it to two other formulae using biparietal diameter instead of head circumference. MATERIAL AND
methodsThe study population consisted of 31 521 singleton pregnancies delivered at 22
resultsFor the formula by Persson and Weldner, MPE was -2.7 (SD 8.9) and the proportion of EFW within ±10% from actual birthweight was 76.0%. MPE was largest for fetuses estimated as severe SGA (<3rd percentile, -5.4) and for the most preterm fetuses (<24 weeks, -5.4). For Hadlock 2 and Shepard's formulae, MPE were 3.9 (SD 8.9) and 3.4 (SD 9.7), respectively, and the proportions of EFW within ±10% from actual birthweight were 69.4% and 67.1%, respectively. MPE was largest for fetuses estimated as severe LGA (>97th percentile), 7.6 and 9.4, respectively.
conclusionsThe recommended Swedish formula by Persson and Weldner is generally accurate for fetal weight estimation. The systematic underestimation of EFW and random error is largest in extreme preterm and estimated SGA-fetuses, which is of importance in clinical decision making. The accuracy of EFW with the formula by Persson and Weldner is as good as or better than Hadlock 2 and Shepard's formulae.
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Registered trials
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