[Blood-groups and the biological background of multifoetal gravidity].
D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D005260:Female; D005828:Genetics, Population; D006801:Humans; D008297:Male; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D015053:Zygote
D000017:ABO Blood-Group System; D001789:Blood Group Antigens
Krvhé skupiny a bilogické pozadie viacplodvej gravidity