title: Customized estimated fetal weight: a novel antenatal tool to diagnose abnormal fetal growth.
abstract: OBJECTIVE
  We sought to apply customized standards to ultrasound-derived estimated fetal weight (EFW), and assess the frequency of abnormal growth when compared to population-based standards. We also evaluated association with adverse perinatal outcomes.
  
  
  METHODS
  This was a historical cohort using prenatal ultrasound examination data at ≥24 weeks over a 1-year period. Ultrasound-derived EFW and growth percentile (population-based EFW [popEFW]) were reported and compared to a customized EFW (custEFW).
  
  
  RESULTS
  In all, 782 women met inclusion criteria. More fetuses were identified as small for gestational age (SGA) (15.1% vs 3.8%; P < .0001) and large for gestational age (LGA) (6.8% vs 1.7%; P < .0001) using custEFW, and adverse perinatal outcomes were more frequent among those identified by the custEFW compared to the popEFW. Both SGA and LGA diagnosed by custEFW were predictive of a neonatal SGA (positive likelihood ratio, 8.64) and LGA (positive likelihood ratio, 15.4).
  
  
  CONCLUSIONS
  CustEFW was a better predictor of abnormal birthweight and adverse outcomes compared to traditional popEFW standards.
authors: Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Texas Medical School at Houston, and Children's Memorial Hermann Hospital-Texas Medical Center, Houston, TX, USA.
authors: Benjamin A
authors: BA
authors: Kase
authors: Carlos A
authors: CA
authors: Carreno
authors: Sean C
authors: SC
authors: Blackwell
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D020567:Fetal Weight; D006130:Growth Disorders / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal