The Collaborative International Dictionary of English v.0.48:

Childbearing \Child"bear`ing\, n.
   The act of producing or bringing forth children; parturition.
   --Milton. Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

childbearing
    adj 1: relating to or suitable for childbirth; "of childbearing
           age"
    n 1: the parturition process in human beings; having a baby; the
         process of giving birth to a child [syn: childbirth,
         childbearing, accouchement, vaginal birth]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "childbearing":
   accouchement, bearing, birth, birth throes, birthing,
   blessed event, childbed, childbirth, confinement, delivery,
   genesis, giving birth, hatching, having a baby, labor, multiparity,
   nascency, nativity, parturition, the Nativity, the stork,
   travail