The Collaborative International Dictionary of English v.0.48:
Pelvimetry \Pel*vim"e*try\, n. [Pelvis + -metry.] (Med.) The measurement of the pelvis. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
pelvimetry n 1: measurement of the dimensions of the bony birth canal (to determine whether vaginal birth is possible)