Is there a lack of O (ABO blood system) newborns?
D000017:ABO Blood-Group System / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D006801:Humans; D007231:Infant, Newborn; D010641:Phenotype; D012204:Rh-Hr Blood-Group System / Q000235:genetics
D000017:ABO Blood-Group System; D012204:Rh-Hr Blood-Group System