Skull (image) University of Vienna Share Print E-Mail Caption The skull of a newborn must fit through the female pelvis at birth -- it has to be as big as the diameter of the birth canal. Credit Copyright: Magdalena Fischer Usage Restrictions The image may only be used with appropriate caption or credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.