title: Growth of the fetal lens and orbit.
abstract: OBJECTIVE
  To present normal lens and orbital measurement ranges by gestational age.
  
  
  METHODS
  Three hundred and thirty-five women with uneventful pregnancies were evaluated from the 15th to the 40th week of gestation. Lens and orbital measurements were added to routine biometric measurements for normal fetuses.
  
  
  RESULTS
  A strong linear correlation was observed between gestational age (GA) and lens diameter (R(2)=0.89; P<0.0001), circumference (R(2)=0.89; P<0.0001), and surface (R(2)=0.90; P<0.0001). A linear correlation was also found between GA and orbital diameter (R(2)=0.92; P<0.0001), circumference (R(2)=0.92; P<0.0001) and surface (R(2)=0.95; P<0.0001). A linear growth function was observed between biparietal diameter and both lens diameter (R(2)=0.90; P<0.0001) and orbital diameter (R(2)=0.94; P<0.0001).
  
  
  CONCLUSIONS
  Lens and orbital measurements provide normative data for fetal growth and development. These data may be also helpful in detecting fetal ocular anomalies.
authors.affiliation: Department of Radiology, Faculty of Medicine, University of Fatih, Emek, Ankara, Turkey. akoktener@yahoo.com
authors.forename: G
authors.initials: G
authors.lastname: Dilmen
authors.forename: A
authors.initials: A
authors.lastname: Köktener
authors.forename: N O
authors.initials: NO
authors.lastname: Turhan
authors.forename: S
authors.initials: S
authors.lastname: Tez
mesh_terms: D005314:Embryonic and Fetal Development; D005123:Eye / Q000196:embryology; D005124:Eye Abnormalities / Q000000981:diagnostic imaging; D005260:Female; D005865:Gestational Age; D006801:Humans; D007908:Lens, Crystalline / Q000033:anatomy & histology / Q000196:embryology*; D009915:Orbit / Q000033:anatomy & histology / Q000196:embryology*; D011247:Pregnancy; D012044:Regression Analysis; D016216:Ultrasonography, Prenatal