The value of the placenta in the determination of zygosity--a study of 1,052 Nigerian twin maternities.
D001789:Blood Group Antigens; D005321:Extraembryonic Membranes; D005260:Female; D005306:Fertilization; D005954:Glucosephosphate Dehydrogenase / Q000097:blood; D006801:Humans; D007231:Infant, Newborn; D009549:Nigeria; D010063:Ovum; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins
D001789:Blood Group Antigens; D005954:Glucosephosphate Dehydrogenase