Predicting macrosomia

Academic Article


  • Objective. The purpose of this study was to evaluate the prediction of fetal macrosomia based on ultrasound estimates of fetal weight and amniotic fluid volume combined with clinical risk factors. Methods. A retrospective cohort study of women undergoing indicated obstetric ultrasound examinations within 7 days of delivery was conducted. Results. A total of 3115 women gave birth within 7 days of ultrasound examinations that included an estimated fetal weight (EFW) and an amniotic fluid index (AFI). Clinical risk factors were associated with an 8% positive predictive value for a birth weight of 4000 g or higher. Adding an ultrasound EFW of 4000 g or higher increased the positive predictive value to 62%. Adding an AFI of 20 cm or higher to the clinical risk factors and the ultrasound EFW further increased the positive predictive value to 71%. Conclusions. An ultrasound EFW of 4000 g or higher within 1 week of delivery combined with clinical risk factors and an increased AFI is associated with macrosomia at birth in 71% of cases. © 2008 by the American Institute of Ultrasound in Medicine.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Pates JA; McIntire DD; Casey BM; Leveno KJ
  • Start Page

  • 39
  • End Page

  • 43
  • Volume

  • 27
  • Issue

  • 1