The Collaborative International Dictionary of English v.0.48:

Childbed \Child"bed\, n.
   The state of a woman bringing forth a child, or being in
   labor; parturition.
   [1913 Webster]

WordNet (r) 3.0 (2006):

childbed
    n 1: concluding state of pregnancy; from the onset of
         contractions to the birth of a child; "she was in labor for
         six hours" [syn: parturiency, labor, labour,
         confinement, lying-in, travail, childbed]