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Did you know that babies are born with more bones than they will have as adults? That's because some of the baby's bones are not yet fused as they will be when they are adults. The difference between the adult skull and the fetal or newborn skull is in both the relative size of the skull, and the presence of the fontanels. These are commonly referred to as the "soft spots." They are areas that have not yet ossified and are made of a fibrous membrane instead of bone. These areas allowed the head of the fetus to fit more easily through the birth canal since the skull, and they allow for growth of the brain. The areas ossify as the baby grows older, completing the process before the age of two.
fontanels. It divides the two frontal bones and the two parietal bones. This fontanel closes last.