What is a common age of onset for symptoms of Tay-Sachs disease?

The onset of symptoms for Tay-Sachs disease typically occurs between 3 to 6 months of age. This timing is significant as it represents a period when developmental milestones are usually being met, and parents may begin to notice delays or regressions in motor skills and cognitive functions. During this age range, infants who may initially appear healthy start to show signs of neurological decline, including decreased responsiveness, increased startle response, and difficulty with motor coordination. Understanding the typical age of onset is important for early detection and intervention strategies in management and support for affected families.