Medically reviewed by Jonathan B. Jassey, DO The Moro reflex is a protective "primitive reflex" seen in healthy babies up to 6 months old. A baby's arms quickly extend away from the body with palms up ...

This is called the Moro reflex, a natural startle reflex present in all infants. It typically fades ... which can alarm parents who fear it’s a sign of an ear infection. While ear infections ...