Babies typically begin to roll over between 4 and 7 months of age. Most infants start by rolling from tummy to back around 4 to 5 months, which is usually easier for them since it involves a smaller change in gravity. Rolling from back to tummy often comes a bit later, closer to around 6 to 7 months, as it requires more complex movements such as rocking and twisting. Some babies may show signs as early as 3 months, but this is less common. Key signs that a baby is getting ready to roll include stronger neck and arm muscles, more tummy time, and increased curiosity about their surroundings. If a baby isn't rolling by 6 months, it’s generally advisable to consult a pediatrician, but keep in mind that every baby develops at their own pace. Additionally, tummy time from birth helps build the muscle strength needed for rolling over, sitting, crawling, and eventually walking. In summary:

• 4 to 5 months: Rolling from tummy to back usually begins.
• 5 to 7 months: Rolling from back to tummy develops.
• By about 7 months: Most babies can roll both ways confidently.

If you have concerns about your baby's development or rolling milestone, consulting a healthcare professional is recommended.