What is the hemoglobin requirement for oxygen transport in neonates, infants, and adults?

The requirement of hemoglobin for effective oxygen transport varies between different age groups due to differences in physiology and the stage of development. In neonates, a hemoglobin level of around 14 g/dl is typical and necessary to ensure adequate oxygenation shortly after birth. This elevated level helps support the transition from intrauterine life, where the fetus relies on maternal hemoglobin, to breathing air independently.

For infants, the normal hemoglobin level drops slightly, typically around 10 g/dl. This reduction is due to the physiological changes as infants grow and their bodies adjust to new demands.

Adults generally maintain a hemoglobin level around 14 g/dl, reflecting their stable physiological state and the need for sufficient oxygen transport to meet metabolic demands.

Thus, the correct option reflects the accurate hemoglobin levels required in neonates, infants, and adults for effective oxygen transport: 14 g/dl for neonates, 10 g/dl for infants, and 14 g/dl for adults, showcasing the transition and differences across these life stages.