The fetus as a homograft.
D005260:Female; D005333:Fetus / Q000276:immunology*; D006649:Histocompatibility Antigens; D006801:Humans; D007109:Immunity; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D011248:Pregnancy Complications / Q000276:immunology; D014184:Transplantation, Homologous; D014327:Trophoblasts / Q000276:immunology
D006649:Histocompatibility Antigens