title: Cell density of the corneal endothelium in human fetus by flat preparation.
abstract: OBJECTIVE
  To count the number of the corneal endothelial cells per unit of tissue area in 25 human fetal eyes ranging from 12-40 weeks of gestation with the histologic method.
  
  
  METHODS
  The endothelium including Descemet's membrane was stained with hematoxylin-eosin by the flat preparation method. We photographed the endothelium using light microscopy. The number of nuclei was counted on each photograph. A calibrated micrometer was photographed with the light microscopy, and this was used to measure the number of corneal endothelial cells per square millimeter.
  
  
  RESULTS
  The prenatal endothelial cell density of the human cornea decreases rapidly from 14,095 cells/mm2 (12 weeks of gestation) to 6,820 cells/mm2 (40 weeks of gestation).
  
  
  CONCLUSIONS
  The estimate of the endothelial cell density at 12 weeks of gestation is twofold higher than the estimate at 40 weeks of gestation.
authors.affiliation: Department of Ophthalmology, Hanyang University, Seoul, Korea. Fovea@email.hanyang.ac.kr
authors.forename: M K
authors.initials: MK
authors.lastname: Ko
authors.forename: J G
authors.initials: JG
authors.lastname: Kim
authors.forename: J G
authors.initials: JG
authors.lastname: Chi
mesh_terms: D002452:Cell Count; D003584:Cytological Techniques; D004728:Endothelium, Corneal / Q000166:cytology* / Q000196:embryology*; D005333:Fetus / Q000166:cytology*; D005865:Gestational Age; D006801:Humans