Which symptom in a newborn would typically require further observation for potential complications?

A persistent high-pitched cry in a newborn often indicates that there could be an underlying issue that requires further evaluation. This type of cry is generally considered abnormal and may suggest certain complications, such as neurological conditions or withdrawal symptoms from substances the infant may have been exposed to in utero. It is important for healthcare providers to monitor this symptom as it might be indicative of distress or other health concerns that warrant immediate attention.

On the other hand, normal feeding reflexes, regular sleep patterns, and normal temperature control are all signs of a healthy newborn. These aspects typically indicate that the baby is functioning within expected parameters, and therefore do not usually raise immediate red flags regarding potential complications.