Babies are born with soft skulls for good reason. After all, their relatively large heads have to pass through the narrow birth canal. The bony plates of their skull only fuse together gradually, allowing room for their brains’ rapid growth during the first year of life. Nevertheless, parents who notice a flat spot on the back or side of their infant’s head in the early weeks after birth are typically alarmed. They needn’t be though, since skull deformities of this kind are quite normal. Almost all infants have head asymmetries during the first five months of their lives, according to the Colo…