title: Fetal ductus venosus pulsatility index and diameter during 20-30 weeks gestation.
abstract: OBJECTIVE
  To present normal range of the pulsatility index and the smallest diameter in the ductus venosus in normal fetuses throughout gestation.
  
  
  METHODS
  This was a prospectively cross-sectional study. Three measurements were made for the ductus venosus diameter and the pulsatility index in each fetus during fetal quiescence. Statistical Package for the Social Sciences 14.0 software was used to create nomograms for the ductus venosus pulsatility index and diameter against gestational age. Four hundred and sixty normal fetuses aged seventeenth to thirty-seventh weeks were evaluated.
  
  
  RESULTS
  The median diameter of the ductus venosus was linear across gestation.
  
  
  CONCLUSIONS
  The nomograms for the ductus venosus pulsatility index and diameter are presented. The size of the narrowest portion of the DV grows in a linear relationship through gestation.
authors.affiliation: Division of Maternal-Fetal-Medicine, Department of Obstetrics and Gynecology, Thammasat University, Pathumthani, Thailand. athitaka@gmail.com
authors.forename: Athita
authors.initials: A
authors.lastname: Chanthasenanont
authors.forename: Densak
authors.initials: D
authors.lastname: Pongrojpaw
authors.forename: Charintip
authors.initials: C
authors.lastname: Somprasit
mesh_terms: D000293:Adolescent; D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D005318:Fetal Heart / Q000002:abnormalities*; D005333:Fetus / Q000098:blood supply*; D006305:Health Status Indicators; D006330:Heart Defects, Congenital / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D049451:Nomograms; D011247:Pregnancy; D011446:Prospective Studies; D012016:Reference Values; D013997:Time Factors; D014463:Ultrasonography; D014471:Umbilical Veins / Q000002:abnormalities*