title: ABO and Rh blood groups in relation to marital status and childlessness in blood donors.
mesh_terms: D000017:ABO Blood-Group System; D000328:Adult; D000368:Aged; D001782:Blood Donors; D001789:Blood Group Antigens; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012204:Rh-Hr Blood-Group System; D012744:Sex Ratio
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D012204:Rh-Hr Blood-Group System