At what age does the fencing reflex disappear in infants?

The fencing reflex, also known as the tonic neck reflex, typically disappears between 3 to 4 months of age. This reflex is characterized by an infant extending the arm and leg on one side of the body while flexing the limbs on the opposite side when the head is turned in that direction. Its disappearance is significant as it indicates the maturing of the infant's neurological system and the development of voluntary motor control. By the age of 3 to 4 months, infants begin to develop more purposeful movements, and the presence of the fencing reflex becomes less common as they gain better control over their limbs and the ability to engage in more complex motor activities.