OverviewDuring a head first birth, pressure on the head caused by the tight birth canal may "mold" the head into an oblong rather than round shape. This is a common occurrence that usually disappears after a few days.
Update Date 11/19/2015
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.