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[–]book-wode 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Newborns' skulls are relatively soft, so maintaining a good sleeping posture helps shape their head shape

[–]Canbot 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

The majority of that looks to be from loss of neck fat.