title: Ultrasonography for fetal weight estimation: the Birnholz equation.
abstract: In the population of 563 normal live births, subject to the selection criteria of this study, the mean ultrasonographically-estimated fetal weight calculated using the Birnholz equation accurately predicts the mean true birth weight with less than 1 percent error. However, on a pairwise basis, the error was found to be systematic (rather than random) with a large standard error of the estimate (+/- 300 g). The equation consistently underestimated the mean birth weight between 1500-3750 g and consistently overestimated it thereafter.
authors.affiliation: Department of Obstetrics and Gynecology, Beth Israel Hospital, Boston, MA 02215.
authors.forename: D B
authors.initials: DB
authors.lastname: Acker
authors.forename: B P
authors.initials: BP
authors.lastname: Sachs
authors.forename: B J
authors.initials: BJ
authors.lastname: Ransil
authors.forename: E A
authors.initials: EA
authors.lastname: Friedman
mesh_terms: D001724:Birth Weight; D001835:Body Weight; D005333:Fetus / Q000033:anatomy & histology*; D006801:Humans; D007231:Infant, Newborn; D008433:Mathematics; D014463:Ultrasonography