J Am Sci 2013;9(12):798-802]. Background Estimation of fetal weight (EFW) by ultrasound is useful in clinical decision-making. Ultrasound Weight Accuracy *POLL* El Chavo Del Ocho 3 kids; USA 10348 posts Feb 8th '17 I just got back from my appointment and Dr wanted an ultrasound because … The ultrasound is more accurate during the first trimester, and early in the second trimester, it is accurate to within a week. Usually on the high side, but sometimes on the low side, so I guess I'm looking for validation. The calculations can give an average weight consistent with these measurements, but can be off by as much as 1/2 to 1 pound when performed by an experienced sonographer. One study found prenatal ultrasound diagnosis of prediction of birth weight to be no more accurate than maternal or clinical predictions of infant birth weight [39]. The secondary outcome was to compare the accuracy of ultrasound with that of the most commonly reported maternal and pregnancy variables, including age, BMI, gestational age at assessment, and Bishop score, in predicting spontaneous onset of labor before 40 weeks of gestation. Accuracy of the EFW is reported to be best when examinations are performed within 7 days before delivery [38]. Ultrasound estimation of fetal weight is a highly influential factor in antenatal management, guiding both the timing and mode of delivery of a pregnancy. EFW is a useful parameter with which to predict birth weight and outcome when it is calculated a few days before delivery. My baby boy was born a 41 weeks 1day at 7.8lbs. OBJECTIVES Late onset fetal growth restriction is often missed and is responsible for most intrauterine deaths. Around week 20, an ultrasound might be used to detect fetal abnormalities. 36 week scan - estimated at 8.5/lbs if born at 40 weeks. Later in the second and into the third trimesters, the ultrasound will be less accurate in predicting. CONCLUSIONS • Ultrasound biometry is overall a quite accurate means for the estimation of fetal weight in routine practice. Please share your experiences with the estimates given from ultrasounds vs. actual birth weights. Unfortunately, the science of weight estimations is quite imprecise. [Mohamed Adam, Jumaa Yousif Tamboul, Mohamed Yousef, Abdelmoneim Sulieman. It is concluded that predicting fetal weight using the formula witch derived by Hadlock et al is accurate and valid and will be useful in our environment. Ultrasound fetal biometry is routinely used to calculate estimated fetal weight (EFW). The purpose of this study is to compare the accuracy of EFW formulas in patients with PPROM, and to further evaluate the … Good job I stuck to my guns and said no because he could have well been user weight. Keep in mind that this is only an estimate. They were even thinking of inducing me at 37 weeks because of his size. The research I've done, just today, on estimated weight vs. actual birth weight is astounding in that at least 50% of the time the estimate is WAY off. Numerous formulas for EFW have been published but have not been validated in pregnancies complicated by preterm premature rupture of membranes (PPROM). The aim of this study was to determine the accuracy of established ultrasound EFW formulae to identify small and large for gestational age fetuses when used after 35 weeks gestation. Most physicians can detect a … It has an accuracy similar to that of clinical ultrasound examination for delivery at or beyond 37 weeks' gestation, whereas it is significantly superior to clinical estimates of weight for preterm birth 6. "The accuracy of these ultrasounds depends on the skill of the technician and … estimated fetal weight (EFW) with the baby’s subsequent weight at birth, for preterm and term gestations. 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