The significance of the Rh factor to obstetrics.
D001789:Blood Group Antigens; D005260:Female; D006801:Humans; D009774:Obstetrics; D011247:Pregnancy; D012204:Rh-Hr Blood-Group System
D001789:Blood Group Antigens; D012204:Rh-Hr Blood-Group System
BLOOD/groups--Rh factor