Sonographically estimated fetal weights: Accuracy and limitation
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2022, American Journal of Obstetrics and Gynecology MFMCitation Excerpt :Several formulas have been developed to estimate fetal weight from ultrasound measurements of various fetal dimensions (biparietal diameter, head circumference [HC], abdominal circumference [AC], and femur length [FL]).4,5 The validity of these formulas has been demonstrated in clinical practice with an estimated systematic error of ≤10%.5–7 Furthermore, the error rate of ultrasound ranges from 2% to 20%, with rare outliers >20% between ultrasound estimations and BW.
Prediction of fetal macrosomia using two-dimensional and three-dimensional ultrasound
2019, European Journal of Obstetrics and Gynecology and Reproductive BiologyCitation Excerpt :Fetal macrosomia can be defined as birthweight above 4000 g regardless of the gestational age or as birthweight above the 95th/97th percentile for the given gestation [1–4] and is an acknowledged risk factor for intrapartum dystocia and other maternal and perinatal complications [5,6]. The evaluation of the estimated fetal weight (EFW) at term is currently not routinely indicated given its limited accuracy [7–10]. Additionally, national and international societies have so far omitted to recommend how to manage the pregnancies where a macrosomic/LGA fetus is suspected.
A modified model can improve the accuracy of foetal weight estimation by magnetic resonance imaging
2019, European Journal of Radiology