Delayed transabdominal passage into the maternal circulation by foetal red cells.
D000017:ABO Blood-Group System; D000328:Adult; D000368:Aged; D001787:Blood Group Incompatibility; D004912:Erythrocytes / Q000378:metabolism*; D005260:Female; D006801:Humans; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012204:Rh-Hr Blood-Group System
D000017:ABO Blood-Group System; D012204:Rh-Hr Blood-Group System