During 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.
Review Date 10/18/2017
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.