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      Scientific American October 2000

      Womb Wars

      New evidence that a mother¿s and father¿s ¿imprinted genes¿ battle to determine a baby¿s size

      • By Lisa Melton

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      More in the October 2000 issue of Scientific American
      • Dingy Skies
      • Mr. Spock, Phone Home
      • Riding the Rumble
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