1. 
   placental circulation
   The circulation of blood through the placenta during intrauterine life, serving the needs of the foetus for aeration, absorption, and excretion; also, maternal circulation through the intervillous space of the placenta. ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?placental+circulation
   
   
2. 
   placental circulation
   Type: Term Definitions: 1. the circulation of blood through the placenta during intrauterine life, serving the needs of the embryo and fetus for aeration, absorption, and excretion; also, maternal circulation through the intervillous space of the placenta.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=17762
   
   
3. 
   Placental Circulation
   The flow of blood through the intervillous space of the placenta, which transfers oxygen and nutritive materials from mother to fetus and carbon dioxide and waste products from fetus to mother.
   Found op http://www.pregnology.com/AZ/P/6
   
   

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