Babies can lie on their stomachs from their very first days of life, as long as they’re awake and someone is watching. Most newborns can start supervised tummy time a day or two after birth. Sleeping on the stomach is a different matter entirely: babies should be placed on their backs for every sleep until their first birthday, though once a baby can roll over independently, you don’t need to reposition them if they flip onto their stomach during the night.
That distinction between awake and asleep is the key to this whole topic. Tummy time while supervised is not only safe from the start, it’s actively encouraged. Stomach sleeping for an infant who can’t yet roll is one of the strongest risk factors for SIDS.
Supervised Tummy Time Starts Right Away
The NIH’s Safe to Sleep campaign recommends beginning tummy time within a day or two of birth. You don’t need to wait for a pediatrician visit or a specific weight milestone. As soon as your baby is home and settled, you can place them belly-down on a firm, flat surface while you stay right there.
For newborns, sessions can be as short as a minute or two at a time. Many parents find that right after a diaper change works well, since the baby is already on their back and alert. The goal in those early weeks isn’t endurance. It’s simply giving your baby brief, repeated chances to experience being on their stomach. Over the first few months, you gradually build up to longer stretches as your baby gets stronger and more comfortable.
Why Tummy Time Matters
Time spent on the stomach strengthens the muscles in a baby’s neck, shoulders, and upper back. These are the same muscles that eventually allow them to hold their head up, push up on their arms, and roll over. Babies who get regular tummy time tend to hit those gross motor milestones on a more typical timeline.
There’s also a cosmetic benefit. Babies who spend most of their time on their backs (as they should for sleep) can develop flat spots on the skull, a condition called positional plagiocephaly. Tummy time redistributes that pressure and gives the back of the head a break. It’s one of the simplest ways to reduce the risk of flattening.
What to Do When Your Baby Hates It
A lot of babies protest tummy time, especially in the first few weeks. This is completely normal. Newborns lack the neck and shoulder strength to lift their heads comfortably, so the position can feel frustrating or even alarming to them. The NHS recommends several alternatives if your baby resists being placed on the floor:
- Chest-to-chest: Lie back at a slight recline and place your baby face-down on your chest. This counts as tummy time, and the closeness often keeps babies calmer.
- Across your lap: Lay your baby stomach-down over your thighs while you’re seated. You can gently rub their back to help them settle.
- Propped slightly: Roll up a small towel and tuck it under your baby’s arms and chest so they’re not completely flat. This takes some of the effort out of lifting the head.
- Get on their level: Talking, singing, or placing a toy within reach gives your baby a reason to stay engaged and lift their head.
The strategy is frequency over duration. A few one-to-two-minute sessions spread throughout the day will do more good than one long stretch that ends in tears. As the weeks pass, most babies adapt and begin tolerating longer periods on their stomachs.
Stomach Sleeping and SIDS Risk
Supervised tummy time is safe. Unsupervised stomach sleeping is not, at least for the first year. The NICHD is clear on this point: healthy babies should be placed on their backs for every sleep, including naps. The first six months are the most critical period, both because SIDS risk peaks during that window and because this is when babies are forming their sleep habits.
The back sleep position is one of the most effective SIDS prevention measures ever identified. Since the “Back to Sleep” campaigns began in the 1990s, SIDS rates dropped dramatically. There is no age before 12 months at which placing an infant to sleep on their stomach becomes safe.
When Rolling Changes the Rules
Most babies learn to roll from their stomach to their back by around six months. Rolling from back to stomach often develops around the same time, sometimes a few weeks earlier or later. Once your baby can roll both directions on their own, a new guideline kicks in: if your baby rolls onto their stomach during sleep, you do not need to flip them back over.
The important part is how you put them down. You should still place your baby on their back at the start of every sleep. If they then roll onto their stomach independently, that’s okay. A baby who has the strength and coordination to roll is generally past the highest-risk period for positional suffocation, because they have the neck control to move their head and clear their airway.
This doesn’t mean you should start placing your baby stomach-down to sleep once they can roll. The guideline is specific: always start on the back, and let your baby find their own position from there. Once babies are older than one year, the back sleep position is no longer necessary, and they can sleep in whatever position they prefer.
Keeping Tummy Time Safe
The surface matters. Use a firm, flat area like a play mat or a blanket spread on the floor. Soft surfaces like couches, adult beds, or pillows create a suffocation risk even during supervised time, because a tired baby can press their face into the material faster than you might react. Keep the area clear of loose blankets, stuffed animals, and pillows.
Stay within arm’s reach the entire time. Tummy time is not a moment to step out of the room, even briefly. Newborns can’t lift or turn their heads reliably, so they depend on you to reposition them if their face presses into the surface. As your baby gets stronger over the coming weeks, this becomes less of a concern, but the supervision rule holds until they’re old enough to move freely on their own.