Can an infant's cry reflect the development of the lungs?

　　An infant's cry usually reflects to some extent the development of the lungs, although it may also be influenced by other factors.

　　If a newborn's first cry after birth is loud and lasts for a relatively long time, this typically serves as a positive signal, indicating that the infant's lungs have received sufficient exercise during delivery, are capable of spontaneous breathing, and have good lung function. As the infant grows, regular and strong crying indicates a gradually increasing lung capacity and normal development of the respiratory system. If an infant's cry is very weak or absent, it suggests the infant may be in a more critical condition, with possible failure of the alveoli to fully expand.

　　Although crying can reflect the development of an infant's lungs, it may also be affected by other factors. An infant's stomach capacity is small, and their digestive system has not fully matured, making them prone to hunger and likely to cry to express their needs. Infants have limited ability to adapt to the environment and are sensitive to stimuli such as noise, light, and temperature. They may cry due to discomfort caused by being in a noisy, brightly lit, or overly hot environment.

　　In daily life, parents are advised to observe the infant's overall health status. In routine care, maintain a safe and clean environment for the infant and schedule regular medical check-ups.