Final answer:
A newborn's head may appear lopsided and not perfectly round due to the presence of fontanels and the newborn's head being proportionally larger compared to their body.
Step-by-step explanation:
A newborn's head may appear lopsided and not perfectly round due to several factors. One factor is the presence of fontanels, which are soft spots in the skull that allow for the baby's head to change shape during birth. These fontanels gradually close and the skull bones ossify after birth, resulting in a rounder head shape. Additionally, the newborn's head is proportionally larger compared to their body, making it seem lopsided.