title: A puzzle in fetomaternal bleeding.
mesh_terms: D000328:Adult; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006470:Hemorrhage / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012204:Rh-Hr Blood-Group System; D014427:Twins
chemical_list: D012204:Rh-Hr Blood-Group System