Xga blood group system and the sex ratio in man.
D001789:Blood Group Antigens; D001787:Blood Group Incompatibility / Q000276:immunology*; D005260:Female; D005828:Genetics, Population; D006801:Humans; D008297:Male; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012744:Sex Ratio
D001789:Blood Group Antigens