title: Gender-specific weight estimation of fetuses between 2,501 and 3,999 g--new regression formulae.
abstract: OBJECTIVE
  To develop new gender-specific regression formulae to estimate fetal weight focusing on a particular weight range from 2,501 to 3,999 g.
  
  
  METHODS
  3,254 singleton pregnancies were included to generate new regression formulae for female and male fetuses, and to evaluate their accuracy.
  
  
  RESULTS
  In comparison with commonly used formulae, the new gender-specific and weight-range-specific method of fetal weight estimation provided greater accuracy. The mean absolute error was less than 7%.
  
  
  CONCLUSIONS
  When properly used, the new formulae can improve the accuracy of weight estimations in fetuses between 2,501 and 3,999 g.
authors.affiliation: Department of Obstetrics and Gynecology, Mannheim University Hospital, Mannheim, Germany. joern.siemer@gyn.ma.uni-heidelberg.de
authors.forename: Jörn
authors.initials: J
authors.lastname: Siemer
authors.forename: Antonia
authors.initials: A
authors.lastname: Hilbert
authors.forename: Tanja
authors.initials: T
authors.lastname: Wolf
authors.forename: Nicola
authors.initials: N
authors.lastname: Hart
authors.forename: Andreas
authors.initials: A
authors.lastname: Müller
authors.forename: Ralf L
authors.initials: RL
authors.lastname: Schild
mesh_terms: D001724:Birth Weight; D003430:Cross-Sectional Studies; D005260:Female; D020567:Fetal Weight; D005333:Fetus / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D012044:Regression Analysis; D012189:Retrospective Studies; D012737:Sex Factors; D016216:Ultrasonography, Prenatal / Q000379:methods*