erythroblastosis fetalis
noun
                                                                                                                            
                                                            erythroblastosis fe·ta·lis
                    
                                                                                                              
                                                                                                                                  -fi-ˈta-ləs 
                                                      
                                                          
            
                                
              
          
                                                      : a hemolytic disease of the fetus and newborn that occurs when the immune system of an Rh-negative mother produces antibodies to an antigen in the blood of an Rh-positive fetus which cross the placenta and destroy fetal erythrocytes and that is characterized by an increase in circulating erythroblasts and by jaundice                                      
                
                    
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