Is it better for a two-month-old baby to sleep lying on their back or on their side?

For a two-month-old baby, sleeping on the back or side is generally fine, and it is recommended to change sleeping positions appropriately. The detailed explanation is as follows:

Under normal circumstances, newborns may sleep on their side, back, or stomach—these are all considered safe sleeping positions that do not significantly affect bodily organs or systems. Therefore, both back-sleeping and side-sleeping are suitable for a two-month-old infant. However, it's important to regularly change the baby's sleeping position regardless of the chosen posture, to avoid prolonged pressure on one area, which could lead to numbness in arms or legs or abnormal head shaping. Additionally, when sleeping on the back, care should be taken to prevent spitting up or reflux, reducing the risk of choking.

Parents are advised to provide proper daily care for the baby, establish healthy sleep habits, and maintain overall physical well-being.