No, it is not safe to place your baby on her stomach to sleep. Infants placed on their stomachs are more than twice as likely to die from Sudden Infant Death Syndrome (SIDS) compared to babies sleeping on their backs. The American Academy of Pediatrics is clear: place infants on their backs for every sleep, including naps, until their first birthday.
That said, this topic has important nuances, especially once your baby starts rolling on her own. Here’s what you need to know.
Why Stomach Sleeping Is Dangerous
When a baby sleeps face down, exhaled air can get trapped near her nose and mouth. Instead of breathing in fresh oxygen, she re-inhales her own carbon dioxide. This drives oxygen levels down, and in some cases, it’s fatal. Adults would simply turn their heads or wake up, but young infants don’t have that reflex reliably developed yet.
Stomach sleeping also makes babies harder to wake up. Babies who sleep on their backs are more “arousable,” meaning they can rouse themselves if something goes wrong, like a blocked airway or dropping oxygen. In the prone position, babies fall into deeper sleep and are less likely to respond to these dangers. Overheating compounds the problem further: a too-warm baby has an even harder time waking up when breathing is compromised. Sleeping face down on a mattress traps heat against the body, making overheating more likely.
Back Sleeping and Choking Risk
Many parents worry that a baby sleeping on her back might choke if she spits up. This is one of the most common concerns, and it’s understandable, but anatomy works in your baby’s favor here. When a baby lies on her back, the airway (trachea) sits above the esophagus. If milk comes back up, gravity pulls it away from the airway, and healthy babies swallow it naturally. Babies are not at increased risk of choking on their backs as long as swallowing and arousal reflexes are functioning normally.
In fact, since the “Back to Sleep” campaign began in the 1990s and millions of babies shifted to back sleeping, choking deaths did not increase. SIDS rates, on the other hand, dropped significantly.
When Your Baby Rolls Over on Her Own
Most babies begin attempting to roll somewhere around 2 to 4 months, though timing varies. Once your baby can roll both ways, from back to stomach and from stomach to back, you can let her stay in whatever position she finds on her own. You don’t need to wake up through the night to flip her back over.
The key distinction is whether she can roll in both directions. If your baby can only roll one way (say, back to stomach but not yet stomach to back), you should gently roll her onto her back whenever you notice she’s flipped. A baby who gets stuck face down without the strength to lift and turn her head is still at risk.
Regardless of your baby’s rolling ability, always start every sleep on her back. Even babies who roll confidently should be placed down in the back position and allowed to reposition themselves.
Stop Swaddling Before Rolling Starts
If you swaddle your baby, watch carefully for the earliest signs of rolling. A swaddled baby who flips onto her stomach has no free arms to push up or reposition, which makes the situation especially dangerous. Stop swaddling as soon as your baby shows any signs of trying to roll over. Some babies start working on this as early as 2 months.
Once you retire the swaddle, a wearable sleep sack with free arms is a safe alternative to keep your baby warm without loose blankets in the crib.
What a Safe Sleep Space Looks Like
Back sleeping is the single most important step, but it works best alongside a few other precautions. The AAP recommends:
- A firm, flat mattress with only a fitted sheet. No pillows, blankets, stuffed animals, or crib bumpers.
- A separate sleep surface in the same room as you. A crib, bassinet, or portable play yard all work.
- Nothing else in the sleep space. Soft bedding and loose items are suffocation hazards.
- No sleeping on couches, armchairs, or car seats (except while riding in the car).
Avoid devices marketed to keep your baby in a specific sleep position. These are not recommended and can create their own dangers.
Tummy Time While Awake
Your baby still needs time on her stomach, just not during sleep. Supervised tummy time while she’s awake builds the neck, shoulder, and arm strength she’ll eventually use to roll, push up, and crawl. It also helps prevent flat spots on the back of the head that can develop from extended time lying on the back.
Start with 2 to 3 short sessions a day, about 3 to 5 minutes each. By around 7 weeks, aim to work up to 15 to 30 minutes total per day. Stay with your baby during tummy time and keep it interactive: get on the floor with her, use toys, and make eye contact. If she fusses, it’s fine to take a break and try again later. The goal is to build up gradually, not to push through distress.