No, newborns should not sleep on their stomachs. The American Academy of Pediatrics and the CDC recommend placing babies on their backs for every sleep, including naps and nighttime, throughout the first year of life. This single change in sleep position has been one of the most effective public health measures for reducing sudden unexpected infant deaths.
Why Stomach Sleeping Is Dangerous
Babies placed on their stomachs face several overlapping risks. They sleep more deeply, respond less to noise, move less, and are harder to wake up compared to back-sleeping babies. That reduced ability to rouse themselves is a core problem, because a baby who can’t wake up easily may not respond when something threatens their breathing.
There’s also a direct airway risk. When a baby is face-down, anything they spit up pools right at the entrance to their windpipe, making it easier to choke. This is the opposite of what many parents assume. The worry that back-sleeping babies will choke on spit-up is one of the most common reasons parents try stomach sleeping, but the data shows the reverse: of the very few reported choking deaths in infants, most occurred in babies who were on their stomachs.
On top of that, a face-down baby on any soft or even slightly uneven surface can end up rebreathing the same pocket of air, which means they take in rising levels of carbon dioxide and decreasing oxygen. Overheating compounds this risk. A baby sleeping prone retains more body heat, and overheating is independently linked to a higher chance of SIDS.
What About Babies Who Roll Over?
Many parents panic the first time their baby flips onto their stomach during the night. The key distinction is between placing a baby on their stomach and a baby getting there on their own. Once your baby can consistently roll in both directions, you can let them stay in whatever position they choose after you place them on their back. The ability to roll both ways signals enough head and neck control to shift position if breathing becomes restricted.
Always start every sleep on the back, even after your baby is a confident roller. And if your baby is swaddled, stop swaddling as soon as you see any signs of trying to roll. Some babies begin working on rolling as early as 2 months, so watch closely. A swaddled baby who flips onto their stomach has no way to use their arms to reposition or lift their face, which creates serious danger. Transitioning to a wearable sleep sack with free arms is a safe alternative once rolling begins.
Rare Medical Exceptions
In a small number of cases, a doctor may recommend prone positioning for a baby with specific conditions. Babies born with certain upper-airway malformations, such as Robin syndrome, can experience airway obstruction that is relieved by lying face-down. Some physicians also believe babies with severe gastroesophageal reflux may benefit from stomach positioning with the head elevated after feeding. These are physician-directed decisions for diagnosed conditions, not general guidance.
Creating a Safe Sleep Surface
Even with back sleeping, the surface matters. Use a firm, flat crib mattress that meets current safety standards. The U.S. Consumer Product Safety Commission requires firmness testing for all crib mattresses, including full-size, non-full-size, and play yard mattresses. A mattress that passes these tests won’t conform around a baby’s face the way a soft surface would.
Keep the sleep area completely clear. No pillows, blankets, comforters, bumper pads, sheepskins, or stuffed animals. Any of these items can press against a baby’s face, block airflow, or cause overheating. Dress your baby in one layer more than you would wear in the same room. Signs of overheating include sweating, a hot chest, or flushed skin.
Tummy Time Is the Safe Alternative
If you’re worried your baby isn’t getting enough time on their stomach, the answer is supervised tummy time while they’re awake. This gives babies the developmental benefits of prone positioning without the risks of unsupervised sleep. Tummy time strengthens neck, shoulder, and arm muscles, builds the motor skills babies need to sit up and eventually crawl, and helps prevent flat spots on the back of the head.
Most babies can start a day or two after birth. Begin with two or three short sessions of 3 to 5 minutes each day. By around 2 months, aim for 15 to 30 minutes of total tummy time spread throughout the day. As your baby grows, sessions naturally get longer and more frequent.
Preventing Flat Spots Without Stomach Sleeping
One reason some parents consider stomach sleeping is concern about their baby developing a flat spot on the back of the head, called positional plagiocephaly. This is manageable without changing sleep position. Alternate which end of the crib you place your baby’s head each day. Babies tend to turn toward the room rather than a blank wall, so switching orientation encourages them to rest on different sides of their head naturally. Placing a mobile on the room-facing side of the crib can also draw their gaze in the right direction.
Combined with regular tummy time when awake, these simple adjustments address flat-spot concerns while keeping back sleeping intact. Most mild flattening resolves on its own as babies gain head control and spend more time upright during the day.