Sex ratio, blood groups and parity.
D000017:ABO Blood-Group System; D000818:Animals; D000941:Antigens; D001789:Blood Group Antigens; D000939:Epitopes; D004899:Erythroblastosis, Fetal / Q000276:immunology; D005260:Female; D005838:Genotype; D006649:Histocompatibility Antigens; D006801:Humans; D007125:Immunogenetics; D007231:Infant, Newborn; D007962:Leukocytes / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed; D008297:Male; D051379:Mice; D010298:Parity; D011247:Pregnancy; D012204:Rh-Hr Blood-Group System; D012744:Sex Ratio
D000017:ABO Blood-Group System; D000941:Antigens; D001789:Blood Group Antigens; D000939:Epitopes; D006649:Histocompatibility Antigens; D012204:Rh-Hr Blood-Group System