This week our baby weighs a little over 4 pounds (heft a pineapple) and has passed the 17-inch mark. She's rapidly losing that wrinkled, alien look and her skeleton is hardening. The bones in her skull aren't fused together, which allows them to move and slightly overlap, thus making it easier for her to fit through the birth canal. These bones don't entirely fuse until early adulthood, so they can grow as her brain and other tissue expands during infancy and childhood.
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