title: Measurements of the normal fetal brain at gestation weeks 17 to 23: a MRI study.
abstract: BACKGROUND
  To obtain measurements of the normal fetal brain before 24 weeks of gestation (GW), a deadline for medical decisions on fetal viability in a large number of countries.
  
  
  METHODS
  We retrospectively reviewed 70 normal MR examinations of fetuses aged GW 17 to 23. The fronto-occipital diameter, the cerebral bi-parietal diameter, the transverse cerebellar diameter, the vermian height, and antero-posterior diameter were measured.
  
  
  RESULTS
  The median, maximum, and minimum values for each parameter were displayed for each individual GW.
  
  
  CONCLUSIONS
  The recorded data might contribute to a better assessment of fetal health by providing normal boundaries for the brain growth.
authors.affiliation: Neuroradiology Section C. Campos Costa, Porto, Portugal. nuno.cm@radiol.uu.se
authors.forename: Nuno Canto
authors.initials: NC
authors.lastname: Moreira
authors.forename: João
authors.initials: J
authors.lastname: Teixeira
authors.forename: Raquel
authors.initials: R
authors.lastname: Themudo
authors.forename: Hashem
authors.initials: H
authors.lastname: Amini
authors.forename: Ove
authors.initials: O
authors.lastname: Axelsson
authors.forename: Raili
authors.initials: R
authors.lastname: Raininko
authors.forename: Johan
authors.initials: J
authors.lastname: Wikstrom
mesh_terms: D001921:Brain / Q000033:anatomy & histology* / Q000196:embryology*; D003198:Computer Simulation; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008953:Models, Anatomic; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity