The Collaborative International Dictionary of English v.0.48:
Birthing \Birth"ing\, n. 1. (Naut.) Anything added to raise the sides of a ship. --Bailey. [1913 Webster] 2. the act or process of giving birth. [PJC]WordNet (r) 3.0 (2006):
birthing n 1: the process of giving birth [syn: parturition, birth, giving birth, birthing]