On intrauterine selection by abo-incompatibility with special reference to maternal age.
D000017:ABO Blood-Group System; D000328:Adult; D000367:Age Factors; D001787:Blood Group Incompatibility; D004622:Embryo, Mammalian; D005260:Female; D005333:Fetus; D006579:Heterozygote; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D013223:Statistics as Topic
D000017:ABO Blood-Group System