The difference in birth weight of human twins.  Twin blood studies.  III.  Placental transfer of amino-acids.
D000596:Amino Acids / Q000378:metabolism*; D001724:Birth Weight; D005260:Female; D006801:Humans; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy; D014427:Twins
D000596:Amino Acids
AMINO ACIDS/metabolism; PLACENTA/physiology; TWINS