Which sign might indicate an infant has developed hypoglycemia?

The indication of extremity tremors in an infant is significant in the context of hypoglycemia. When an infant experiences low blood sugar levels, the body may react with neurological symptoms, one of which can be tremors of the extremities. This reflects a lack of adequate glucose supply to the brain and results in an unstable neurological state, leading to these tremors.

The other options suggest stable or positive conditions: stable feeding patterns, easy respiratory transitions, and consistent weight gain generally indicate good health and normal metabolic function. In contrast, tremors signal the need for an immediate assessment of blood glucose levels, making the identification of this symptom crucial for timely intervention and management of hypoglycemia in infants.