Ultrasonographic fetal weight estimation: accuracy of formulas and accuracy of examiners by birth weight from 500 to 5000 g
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Abstract
Objective: To determine the accuracy of birth weight in different birth weight (BW) groups using widely accepted formulas for fetal weight estimation (EFW). The secondary purpose was to estimate the role of examiners on the accuracy of EFW.
Methods: The cross-sectional data were obtained from 5612 pregnant women. Fetal weight was estimated for each fetus using the formulas of Campbell and Wilkin, Shepard, 2 formulas of Hadlock and Merz. Inclusion criteria were: singleton pregnancy, complete ultrasound parameters, EFW obtained within the last week prior to delivery, the live born infant without congenital malformations or hydrops.
Results: The highest intraclass correlation coefficient and the most stable results in all BW groups were generated with both Hadlock formulas. Both Hadlock and Campbell formulas had the lowest percent errors (PE) in BW groups between <1500 g and 3500 g. Shepard and Merz formulas had lower PEs in BW groups between 3501 g and >4000 g. However in BW groups under 3500 g they were imprecise. The PE of EFW varied from −4.0±8.5% to 1.3±8.5% between examiners.
Conclusions: Both Hadlock formulas showed the most stable results in all of the weight groups. There is also a need for routine evaluation of the accuracy of EFW for every examiner, to make suggestions, what fetal measurements must be improved to improve EFW.
Copyright © 2004 by Walter de Gruyter GmbH & Co. KG
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Artikel in diesem Heft
- Fetal cardiovascular response to large placental chorioangiomas
- Characteristics of mothers who delivered the heaviest, average-weight, and lightest triplet sets
- Amniotic fluid concentrations of collagenase-1 and collagenase-3 are increased in polyhydramnios
- Oxytocic activity of thrombin: modulation of thrombin-induced gravid rat myometrial contractions by 5-hydroxytryptamine receptor antagonists
- Structural-tridimensional study of yolk sac in pregnancies complicated by diabetes
- Is cervical dilatation during parturition at term associated with apoptosis?
- Amnioreduction in patients with bulging prolapsed membranes out of the cervix and vaginal orifice in cervical cerclage
- The association of birthweight with maternal and cord serum and amniotic fluid growth hormone and insulin levels, and with neonatal and maternal factors in pregnant women who delivered at term
- Ultrasonographic fetal weight estimation: accuracy of formulas and accuracy of examiners by birth weight from 500 to 5000 g
- Atypical chronic lung disease in preterm infants
- Clinical characteristics and follow up of Down syndrome infants without congenital heart disease who presented with persistent pulmonary hypertension of newborn
- Mortality and long term morbidity in esophageal atresia: the reduced impact of low birth weight and maturity on surgical outcome
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- HELLP syndrome, multifactorial thrombophilia and postpartum myocardial infarction
- Management of cervical pregnancy: risk factors for failed systemic methotrexate
- Autologous cord blood transfusion in an infant with a huge sacrococcygeal teratoma
- Intussusception in a preterm neonate; a very rare, major intestinal problem – systematic review of cases
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