The Collaborative International Dictionary of English v.0.48:

Primipara \Pri*mip"a*ra\, n. [L., fr. primus first + parere to
   bring forth.] (Med.)
   A woman who bears a child for the first time.
   [1913 Webster]

WordNet (r) 3.0 (2006):

primipara
    n 1: (obstetrics) woman who has been delivered of a child for
         the first time [syn: primipara, para I]