Quick Answer
Proper swaddling has not been shown to cause general developmental delays when it is used safely and babies also have plenty of unrestricted movement while awake. The bigger developmental concern is how a baby is swaddled. Swaddling that forces the legs straight and tightly together can interfere with healthy hip positioning and increase the risk of developmental dysplasia of the hip. Babies should have room to bend and move their hips and knees, spend plenty of supervised awake time out of the swaddle, and stop being swaddled as soon as they show signs of attempting to roll.
Key Takeaways
- There is no good evidence that appropriate newborn swaddling causes broad developmental delays.
- Babies should not spend excessive amounts of awake time restrained in a swaddle.
- Swaddling should allow the hips and knees to bend and move freely.
- Tight, straight-leg swaddling can increase the risk of developmental dysplasia of the hip.
- Babies need supervised, unrestricted floor time while awake for motor development.
- Tummy time should always occur while a baby is awake, supervised, and unswaddled.
- A swaddle should never prevent a baby from moving their legs naturally.
- Swaddling should stop when a baby begins showing signs of attempting to roll.
- Swaddled babies should always be placed on their backs to sleep.
- Parents with concerns about hip development or motor milestones should speak with their pediatric healthcare provider.
Introduction
Swaddling is one of the oldest newborn soothing techniques.
Many babies seem to settle almost immediately when their arms are gently contained. For exhausted parents, swaddling can feel like one of the few things that helps their newborn relax long enough to sleep.
Then comes the worry:
If my baby is wrapped up so often, could it interfere with their development?
It is a reasonable question.
Newborn development depends heavily on movement. Babies need opportunities to kick, stretch, turn their heads, strengthen their muscles, and gradually learn how their bodies work.
But that doesn't mean swaddling itself causes developmental delay.
The important distinction is between using a swaddle appropriately for sleep and calming versus keeping a baby overly restricted for long periods or using a technique that forces the hips and legs into an unhealthy position.
Does Swaddling Delay Motor Development?
There is not strong evidence showing that appropriately used swaddling causes general motor developmental delays in healthy babies.
Swaddling is typically used during the newborn period, when babies spend a significant portion of each day sleeping.
When awake, babies should have frequent opportunities to move freely.
That means taking them out of the swaddle for:
- Feeding.
- Diaper changes.
- Skin-to-skin contact.
- Floor play.
- Tummy time.
- Interaction with caregivers.
- Opportunities to kick and stretch.
The concern is not that a baby occasionally sleeps while swaddled.
The concern would be excessive restriction of normal movement, particularly if a baby spends long stretches swaddled while awake as well.
Babies Need Freedom to Move While Awake
Movement is one of the ways newborns begin developing strength and coordination.
During awake periods, babies naturally:
- Kick their legs.
- Move their arms.
- Turn their heads.
- Bring their hands toward their face.
- Stretch.
- Respond to sights and sounds.
- Gradually develop greater control over their bodies.
These seemingly random movements are part of early neuromuscular development.
Parents therefore shouldn't think of swaddling as something a newborn should remain in around the clock.
It is a tool—not a default body position for the entire day.
What About Hip Development?
This is where swaddling technique matters significantly.
A newborn's hips are still developing.
The International Hip Dysplasia Institute recommends that when babies are swaddled, their hips should be able to remain flexed and move outward naturally. The knees should also remain somewhat bent.
The legs should not be tightly wrapped straight down and pressed together.
That type of restrictive positioning can increase the risk of developmental dysplasia of the hip, or DDH.
What Is Developmental Dysplasia of the Hip?
Developmental dysplasia of the hip occurs when the hip joint does not develop or remain positioned normally.
The hip is a ball-and-socket joint.
During infancy, the structures of that joint are still developing. Healthy hip positioning allows the upper legs to naturally bend and move outward.
When a baby's legs are repeatedly forced straight and tightly together, that positioning may place abnormal stress on the developing hip joint.
The International Hip Dysplasia Institute specifically identifies tight swaddling that restricts hip movement as a risk factor for hip dysplasia.
This is why modern swaddling guidance emphasizes hip-healthy swaddling, rather than tightly wrapping a baby's entire body like a straight little burrito.
What Does Hip-Healthy Swaddling Look Like?
A hip-healthy swaddle may feel snug around the baby's upper body while allowing much greater freedom around the lower body.
Your baby's legs should be able to:
- Bend at the knees.
- Flex at the hips.
- Move apart naturally.
- Shift position inside the swaddle.
The lower portion of the swaddle should not force the legs straight.
If your baby's legs look pinned together or cannot bend naturally, the swaddle is too restrictive.
The International Hip Dysplasia Institute advises allowing enough room for the hips to move freely into flexion and outward positioning.
Swaddling Should Not Replace Tummy Time
One concern parents sometimes have is that swaddling prevents babies from developing strength.
The answer is simple:
Babies shouldn't be doing their developmental play while swaddled.
Tummy time should happen:
- While baby is awake.
- While baby is supervised.
- On an appropriate surface.
- With the baby completely free to move.
Tummy time helps babies develop strength in the:
- Neck.
- Shoulders.
- Upper body.
- Trunk.
It also gives babies opportunities to practice movements that eventually contribute to later motor skills.
Swaddling for sleep and providing abundant movement opportunities while awake are not mutually exclusive.
A baby can safely experience both.
Is It Possible to Swaddle a Baby Too Much?
Yes.
Even if the technique itself is safe, babies should not remain swaddled unnecessarily throughout their awake periods.
Consider the swaddle primarily as a sleep and calming tool.
When your baby is awake and alert, give them opportunities to:
- Stretch.
- Kick.
- Move their arms.
- Practice tummy time.
- Look around.
- Interact with you.
- Experience different safe positions.
The newborn period is filled with small opportunities for movement and sensory learning.
There is no developmental benefit to keeping an alert baby wrapped simply because they tolerate it.
When Should Parents Stop Swaddling?
Swaddling becomes unsafe when a baby begins showing signs that they may roll.
Once a swaddled baby rolls onto their stomach, their restricted arms may make it difficult to reposition themselves.
For this reason, swaddling should stop at the first signs of attempting to roll, rather than waiting until rolling is fully established.
Signs may include:
- Repeatedly shifting onto the side.
- Strong twisting movements.
- Trying to roll during awake time.
- Increasing body rotation.
Babies develop at different rates, so there isn't one exact age that applies to every child.
Developmental signs matter more than the calendar.
What About Swaddling With Arms Out?
Some families transition from traditional swaddling to wearable sleep products that leave the arms unrestricted.
Once a baby is showing signs of attempting to roll, the goal is no longer to restrain the arms.
Parents should choose appropriately sized sleepwear designed for the baby's developmental stage and continue following safe sleep recommendations.
Weighted swaddles and weighted sleep products should not be used for infants.
Safe Sleep Still Applies When Swaddling
Swaddling does not replace any safe sleep recommendation.
A swaddled baby should still:
- Be placed on their back for every sleep.
- Sleep on a firm, flat, non-inclined surface.
- Sleep in a crib, bassinet, portable crib, or play yard that meets applicable safety standards.
- Have no loose blankets, pillows, stuffed animals, bumpers, or positioners in the sleep space.
- Avoid overheating.
Swaddling may help some babies settle, but it does not make an otherwise unsafe sleep environment safe.
What About Babies With Hip Dysplasia?
If your baby has been diagnosed with developmental dysplasia of the hip, is being evaluated for it, or is using a Pavlik harness or another orthopedic device, follow your child's orthopedic or pediatric healthcare provider's instructions.
Swaddling may need to be modified significantly.
The International Hip Dysplasia Institute notes that even mild restriction of hip movement can be problematic in babies with unstable hips, making appropriate positioning especially important for this group.
Don't modify an orthopedic device or wrap a baby in a way that interferes with prescribed positioning unless instructed by the healthcare team.
Common Misconceptions About Swaddling and Development
Myth: Swaddling Stops Babies From Learning to Move
Fact: Appropriate swaddling during sleep does not mean a baby cannot develop normally. Babies should simply have plenty of opportunities for unrestricted movement while awake.
Myth: A Swaddle Should Keep a Baby's Legs Completely Straight
Fact: The opposite is true. Babies should be able to bend and move their hips and knees naturally. Restrictive straight-leg swaddling can increase the risk of hip dysplasia.
Myth: The Tighter the Swaddle, the Better the Baby Will Sleep
Fact: A swaddle should be secure without restricting breathing or healthy hip movement. Tighter is not necessarily safer or more effective.
Myth: Swaddling Means You Can Skip Tummy Time
Fact: Babies still need supervised tummy time and other opportunities for unrestricted awake movement.
Myth: You Can Continue Swaddling Until the Baby Fully Rolls
Fact: Swaddling should stop when a baby begins showing signs of attempting to roll, not after rolling becomes routine.
How to Balance Swaddling and Healthy Development
Parents don't need to choose between soothing their newborn and supporting development.
A balanced approach may look like this:
Swaddle appropriately for sleep when your baby benefits from it.
When your baby wakes, remove the swaddle.
Feed them.
Hold them.
Let them stretch.
Offer supervised tummy time.
Give them opportunities to kick freely on a safe surface.
Interact with them.
Then, when it's time for another sleep, swaddle again if it remains developmentally appropriate.
Healthy newborn development happens across the entire day—not during one isolated sleep period.
When to Talk With Your Pediatrician
Talk with your baby's healthcare provider if you notice concerns such as:
- One leg moving differently from the other.
- Difficulty spreading the baby's thighs during routine care.
- Significant differences in leg position.
- Concerns about hip development.
- Delays in expected motor development.
- Unusual stiffness or floppiness.
- Loss of previously acquired skills.
Routine pediatric visits are also an excellent opportunity to ask whether your baby's sleep practices and developmental activities remain appropriate as they grow.
The Bigger Picture
Parents are often presented with newborn care advice as though every practice is either completely good or completely bad.
Swaddling is more nuanced than that.
Swaddling isn't inherently harmful to development.
How it is used matters.
A safely swaddled newborn who sleeps for a period, then spends their awake time kicking, stretching, practicing tummy time, interacting with caregivers, and moving freely is having a very different experience from a baby who remains tightly restrained for much of the day.
The goal isn't maximum containment.
It's appropriate support for the baby's developmental stage.
Use swaddling when it helps.
Protect your baby's hips.
Provide plenty of unrestricted movement while awake.
And when your baby begins showing you they're ready to move beyond the swaddle, follow their development and let it go.
Sources
- International Hip Dysplasia Institute. Hip-Healthy Swaddling. The IHDI recommends allowing infant hips and knees to remain flexed with freedom for the legs to move outward and warns against restrictive straight-leg swaddling.
- International Hip Dysplasia Institute. Baby Carriers & Related Products: Consensus Statements. IHDI identifies tight swaddling and restricted hip motion as practices that can contribute to hip dysplasia.
- International Hip Dysplasia Institute. New Warning About Swaddling. Information on the importance of unrestricted hip movement, particularly for babies with unstable hips or diagnosed hip dysplasia.
- American Academy of Pediatrics. Safe Sleep Recommendations. HealthyChildren.org safe sleep information
About The Newborn Care Solutions Agency
The Newborn Care Solutions Agency is the only newborn care placement agency founded by an internationally accredited training provider. Based in Scottsdale, Arizona, we serve families nationwide by connecting them with rigorously vetted, professionally trained Newborn Care Specialists and Postpartum Doulas.
Newborn care involves much more than helping a baby sleep. Our professionals can help families understand developmentally appropriate soothing, safe sleep practices, newborn cues, feeding, tummy time, age-appropriate routines, and when common newborn practices such as swaddling need to change as a baby develops.
Having experienced newborn support in the home can also help parents sort through conflicting advice and feel more confident about which practices are appropriate for their individual baby.
For more information, visit The Newborn Care Solutions Agency or call (602) 695-6775.
