The completed reproductive performances of 161 couples selected before marriage and classified by ABO blood group.
D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D005191:Family Characteristics; D006801:Humans; D008393:Marriage; D012098:Reproduction; D014798:Vital Statistics
D000017:ABO Blood-Group System; D001789:Blood Group Antigens
BLOOD GROUPS; VITAL STATISTICS