At birth , scalp hair was present .
After ritual shaving at 1 week of age , scalp hair grew back ; however , the hair was fragile and began falling out at 2 to 3 months of age , eventually leaving only sparse hair on the scalp .
At birth , scalp hair was present , and after ritual shaving at 1 week of age , scalp hair grew back ; however , the hair was fragile and began falling out at 2 to 3 months of age , eventually leaving only sparse hair on the scalp .