Relationships between the ABO blood group system and some obstetric factors.
D000017:ABO Blood-Group System; D000293:Adolescent; D000328:Adult; D001315:Australia; D001722:Birth Order; D005260:Female; D005313:Fetal Death / Q000097:blood*; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D011247:Pregnancy; D012189:Retrospective Studies
D000017:ABO Blood-Group System