title: Contents of chemical elements in stomach during prenatal development: different age-dependent dynamical changes and their significance.
abstract: OBJECTIVE
  To observe dynamic of different chemical elements in stomach tissue during fetal development.
  
  
  METHODS
  To determine contents of the 21 chemical elements in each stomach samples from fetus aging four to ten months. The content values were compared to those from adult tissue samples, and the values for each month group were also analyzed for dynamic changes.
  
  
  RESULTS
  Three representations were found regarding the relationship between contents of the elements and ages of the fetus, including the positive correlative (K), reversely correlative (Na, Ca, P, Al, Cu, Zn, Fe, Mn, Cr, Sr, Li, Cd, Ba, Se ) and irrelevant groups (Mg, Co, Ni, V, Pb, Ti).
  
  
  CONCLUSIONS
  The chemical elements' contents in stomach tissues were found to change dynamically with the stomach weights. The age-dependent representations for different chemical elements during the prenatal development may be of some significance for assessing development of fetal stomach and some chemical elements. The data may be helpful for the nutritional balance of fetus and mothers during prenatal development and even the perinatal stages.
authors.affiliation: Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China. lihr@igsnrr.ac.cn
authors.forename: Shao-Fan
authors.initials: SF
authors.lastname: Hou
authors.forename: Hai-Rong
authors.initials: HR
authors.lastname: Li
authors.forename: Li-Zhen
authors.initials: LZ
authors.lastname: Wang
authors.forename: De-Zhu
authors.initials: DZ
authors.lastname: Li
authors.forename: Lin-Sheng
authors.initials: LS
authors.lastname: Yang
authors.forename: Chong-Zheng
authors.initials: CZ
authors.lastname: Li
mesh_terms: D000328:Adult; D002681:China; D004602:Elements; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005260:Female; D005865:Gestational Age; D006801:Humans; D008670:Metals / Q000032:analysis; D011247:Pregnancy; D013270:Stomach / Q000737:chemistry* / Q000196:embryology*
chemical_list: D004602:Elements; D008670:Metals