What typically happens to glucose levels in newborns after birth?

• A. They increase immediately
• B. They stabilize quickly
• C. They reach their lowest point about an hour after birth
• D. They remain constant

Answer: (C)

After birth, glucose levels in newborns typically reach their lowest point around one hour after delivery, which is primarily due to the transition from fetal to neonatal metabolism. During pregnancy, the mother’s body supplies glucose to the fetus via the placenta, leading to high fetal insulin levels. Once the cord is clamped and the newborn is separated from the maternal circulation, its ability to metabolize and utilize glucose is adjusted.

The initial drop in glucose levels is influenced by several factors, including the newborn's reliance on glycogen stores in the liver and the onset of feeding. In the first hour of life, as the newborn begins to adapt to extrauterine life and experiences the effects of stress and the loss of maternal glucose supply, the glucose levels can fall as glycogen stores are utilized.

Understanding this physiological process is crucial for monitoring and managing the health of the newborn, as low blood glucose can lead to hypoglycemia, which may require intervention. Immediate stabilization does happen afterwards as feeding begins and the newborn's metabolic processes adjust, but the timing of the lowest glucose point is a critical detail in neonatal care.