Until what age is the Moro reflex expected to be present in infants?

The Moro reflex, also known as the startle reflex, is a primitive reflex observed in newborns. It is characterized by the infant extending their arms and legs and then quickly pulling them back in when they feel a sensation of falling or a loud noise.

This reflex typically appears at birth and is expected to be present until around 4 months of age. By this time, most infants will begin to lose this reflex as their nervous system matures and they develop more controlled and purposeful movements. The disappearance of the Moro reflex is a normal part of neurodevelopment and indicates that the infant's brain and muscles are developing appropriately.

This timeframe is crucial for assessing the neurologic development of infants. If the reflex persists beyond 4 months, it may indicate a potential neurological issue, which warrants further assessment.

Understanding the timeline of the Moro reflex helps caregivers and healthcare professionals monitor infant development and recognize when to seek further evaluation if the expected milestones are not met.