title: Maternal blocking factors in human pregnancy are found in plasma not serum.
abstract: Pregnancy plasma and sera were evaluated for differential blocking effects in mixed lymphocyte culture reactions. Autologous pregnancy plasma, but not serum was found to contain a specific allogeneic inhibitor for paternal lymphocytes.
mesh_terms: D000017:ABO Blood-Group System; D000022:Abortion, Spontaneous / Q000276:immunology; D003602:Cytotoxicity, Immunologic; D005260:Female; D006801:Humans; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D010949:Plasma / Q000276:immunology*; D011247:Pregnancy; D014327:Trophoblasts / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System