STOCKHOLM, SWEDEN and COPENHAGEN, DENMARK--(Marketwire - November 20, 2008) - Biovitrum AB (publ) (STO: BVT) and Symphogen A/S have completed the first part of a clinical proof of mechanism study of the recombinant human polyclonal antibody product Sym001 for future prevention of Hemolytic Disease of the Newborn (HDN) that can occur in RhD-negative mothers carrying a RhD-positive fetus. This can lead to an immune reaction causing destruction of the red blood cells in the newborn, which may give rise to severe anemia, jaundice, and even cause heart failure and fatality.