Placentation and zygosity of twins in Ibadan, Nigeria.
D044383:Black People; D001789:Blood Group Antigens; D005260:Female; D005306:Fertilization; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009549:Nigeria; D010063:Ovum; D010447:Peptide Hydrolases / Q000032:analysis; D010733:Phosphoglucomutase / Q000032:analysis; D010920:Placenta / Q000201:enzymology; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins
D001789:Blood Group Antigens; D010447:Peptide Hydrolases; D010733:Phosphoglucomutase