The Collaborative International Dictionary of English v.0.48:

Procreation \Pro`cre*a"tion\, n. [F. procr['e]ation, L,
   procreatio.]
   The act of begetting; generation and production of young.
   --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

procreation
    n 1: the sexual activity of conceiving and bearing offspring
         [syn: reproduction, procreation, breeding, facts of
         life]