The Collaborative International Dictionary of English v.0.48:

young-bearing \young"-bear*ing\, adj.
   1. (Zool.) being the sex that produces ova and carries the
      fetus to a point where it can live outside the parent; --
      of animals. [prenominal]

   Syn: egg-producing(prenominal).
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

young-bearing
    adj 1: capable of producing eggs and bearing offspring [syn:
           egg-producing(a), young-bearing(a)]