Everyone is born without one. When you were born the umbilical cord was where your bellybutton is today. Without it you would not have been able to grow inside your mother. When you came out it was cut and then it shriveled up and fell off. There was a scar and that is your bellybutton. You can not be born without one. If there was something wrong with it afterwards it could be removed and nothing would happen. After birth we have no need for it.
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