Normally, an infant’s fontanel closes around the age of one year. It is also normal for some babies in the newborn period to be able to see the jumping of the fontanel, and for some babies not to be able to see the jumping of the fontanel. Whether or not a newborn’s fontanel jumps is related to the size of the fontanel and the child’s activity. When a newborn is calm, there are times when you can’t see the fontanel jumping. When the newborn is crying violently and the intensity of the activity is high, the jumping of the fontanel will be more obvious and normal. Even when the fontanel is not beating, the newborn can feel the fluctuation of the fontanel by touching it with the hand. If the fontanel is small and pulsations are not palpable, you must be alert to the possibility of microcephaly, which is most commonly caused by viral infections.