Source : Webster's Revised Unabridged Dictionary (1913)

Pregnancy \Preg"nan*cy\, n.
   1. The condition of being pregnant; the state of being with
      young.

   2. Figuratively: The quality of being heavy with important
      contents, issue, significance, etc.; unusual consequence
      or capacity; fertility. --Fuller.

Source : WordNet®

pregnancy
     n : the state of being pregnant; the period from conception to
         birth when a woman carries a developing fetus in her
         uterus [syn: {gestation}, {maternity}]