1. Sleep quality: The baby's sleep quality can be evaluated by observing its sleep time, sleep duration and wake-up times. Under normal circumstances, the baby should have enough sleep time at night, and be able to fall asleep continuously and stay asleep for a long time.
2. Breathing condition: The baby's breathing should be stable and regular. If the baby has abnormal conditions such as shortness of breath, wheezing or snoring while sleeping, it may be necessary to further check whether there are respiratory problems.
3. Posture and posture: The posture and posture of the baby when sleeping can also provide some clues. Under normal circumstances, the baby should be free to choose a comfortable sleeping position without obvious discomfort or pain.
4. Facial expressions and movements: The expressions and movements of the baby during sleep can also reflect its health status. Under normal circumstances, the baby should be able to relax and fall asleep without obvious pain or discomfort.
5. Sleep cycle: The baby's sleep cycle includes two stages: shallow sleep and deep sleep. Under normal circumstances, the baby should be able to switch between these two stages naturally, and there is no frequent waking up.
It should be noted that each baby's sleep habits and health status may be different. If you have any questions or concerns about your baby's sleep, it is recommended to consult a pediatrician for further evaluation and suggestions.