[Blood groups of mothers and their newborn infants, sex ratio of newborns].
D001789:Blood Group Antigens; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D012737:Sex Factors
D001789:Blood Group Antigens
Anya és magzatának vércsoportja az újszülöttek nemi aránya.