title: Nomograms of the fetal heart between 16 and 39 weeks of gestation.
abstract: OBJECTIVE
  To establish the normal fetal cardiac measurement from 16 to 39 weeks' gestation in Thai fetuses.
  
  
  METHODS
  Four hundred and eighty normal singleton pregnant women were recruited into the present study. The sonographic measurements were obtained from axial scans at the level of the four-chamber view.
  
  
  RESULTS
  The regression model for cardiac circumference (CC), thoracic circumference (TC), thickness of left ventricular wall during diastole (LVW), diameter of left ventricle during diastole (LVD) and systole (LVS) and thickness of interventricular septum during diastole (IVS) were best fit by allowing a polynomial for gestational age. The cardiothoracic ratio (CTR) and shortening fraction of left ventricle (SFLV) were not statistically different with advancing gestation.
  
  
  CONCLUSIONS
  The normal values of fetal CC, TC, CTR, LVW, LVD, LVS, IVS and SFLV during gestation were established These data could serve as a standard to investigate cardiac change in pregnancies with fetuses at risk.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Thammasat University, Bangkok 12120, Thailand. athitaka@gmail.com
authors.forename: Athita
authors.initials: A
authors.lastname: Chanthasenanont
authors.forename: Charintip
authors.initials: C
authors.lastname: Somprasit
authors.forename: Densak
authors.initials: D
authors.lastname: Pongrojpaw
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D003971:Diastole / Q000502:physiology; D005260:Female; D047109:Fetal Development / Q000502:physiology*; D005318:Fetal Heart / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005865:Gestational Age; D006346:Heart Septum / Q000000981:diagnostic imaging; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D015233:Models, Statistical; D049451:Nomograms; D011247:Pregnancy; D012044:Regression Analysis; D013599:Systole / Q000502:physiology; D016216:Ultrasonography, Prenatal; D055815:Young Adult