CAMBRIDGE, Mass., Oct. 30, 2007 (PRIME NEWSWIRE) -- Momenta Pharmaceuticals, Inc. (Nasdaq:MNTA), a biotechnology company specializing in the characterization and engineering of complex drugs, today announced the appointment of Elizabeth Stoner, M.D. to its Board of Directors effective October 25, 2007. Dr. Stoner is an industry veteran with broad expertise in clinical research and pharmaceutical product development.