The Collaborative International Dictionary of English v.0.48:

Parturition \Par`tu*ri"tion\, n. [L. parturitio, fr. parturire:
   cf. F. parturition. See Parturient.]
   1. The act of bringing forth, or being delivered of, young;
      the act of giving birth; delivery; childbirth.
      [1913 Webster]

   2. That which is brought forth; a birth. [Obs.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

parturition
    n 1: the process of giving birth [syn: parturition, birth,
         giving birth, birthing]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "parturition":
   accouchement, babyhood, bearing, beginnings, birth, birth throes,
   birthing, blessed event, childbearing, childbed, childbirth,
   childhood, confinement, cradle, delivery, freshman year, genesis,
   giving birth, hatching, having a baby, inception, inchoation,
   incipience, incipiency, incunabula, infancy, labor, multiparity,
   nascence, nascency, nativity, origin, origination, pregnancy,
   the Nativity, the stork, travail, youth