At what age can an infant typically roll from supine to sidelying?

At about 3 to 4 months of age, infants generally develop the ability to roll from a supine (lying on their back) position to sidelying (lying on their side). This skill emerges as they gain increased strength and control over their neck, trunk, and shoulder muscles, which enables them to initiate movements with their arms and legs. During this age range, infants also begin to demonstrate better coordination and balance, allowing them to use their physical capabilities to achieve different positions.

This milestone is often highlighted in developmental assessments, as rolling is an important step in the progression of gross motor skills. As infants continue to practice this movement, they will become more adept at rolling, which also serves as a precursor to future movements such as sitting and crawling. Other age options do not typically align with the expected developmental timeline for this specific skill.