Pregnancy: an immunological enigma.
D000937:Antigen-Antibody Reactions; D000941:Antigens; D005260:Female; D005333:Fetus / Q000276:immunology; D006648:Histocompatibility; D006801:Humans; D010920:Placenta / Q000276:immunology; D011247:Pregnancy; D014599:Uterus / Q000276:immunology
D000941:Antigens