The difference in birth weight of human twins.  Twin blood studies.  I.  Oxygen analysis of umbilical cord blood.
D001724:Birth Weight; D001769:Blood; D005312:Fetal Blood; D006801:Humans; D010100:Oxygen; D014427:Twins; D014470:Umbilical Cord / Q000097:blood*
D010100:Oxygen
BLOOD; TWINS; UMBILICAL CORD/blood in