A baby's head typically becomes more stable around 4 months of age.
While every baby develops at their own pace, most babies begin to gain better control of their head, neck, and trunk muscles around the age of 4 months. This increased muscle strength and coordination allows them to hold their head up for short periods when in a stable position, such as when sitting with support or being held upright. It is important to remember that this is an approximate age, and some babies may achieve head stability a little earlier or later. Continued tummy time and supervised practice with sitting and holding their head up will help your baby develop these important motor skills.