Is Swaddling Bad for Baby's Hips? How to Swaddle Safely

By the Tinytato Team · Updated October 2026 · 5 min read

Quick answer

Swaddling is not bad for hips when it is done right. The risk comes from wrapping the legs straight down and pressed together, which the International Hip Dysplasia Institute says may increase the risk of hip dysplasia. A hip-healthy swaddle is snug at the chest and loose at the bottom, so baby's legs can bend up and out like a frog.

Your mother-in-law wraps baby's legs straight and tight, "so they grow straight". Then you read online that swaddling can damage the hips.

Both sides are half right. Swaddling itself is fine. Straight, tight legs are the problem.

In this article

Why straight legs are the problem
Hip-healthy swaddling: do and don't
The 10-second hip check for any swaddle
Cloth wrap vs zip swaddle for hips
When to ask the doctor
Frequently asked questions about swaddling and baby's hips

Can swaddling cause hip dysplasia?

Tight swaddling with the legs straight can. Loose swaddling at the hips is not linked to it.

Here is why. In the womb, baby's legs are bent up and crossed. After birth, the hip joint is still soft: the socket edges are cartilage, and the ball sits loosely in it for the first few months. The International Hip Dysplasia Institute (IHDI) explains that suddenly straightening the legs can loosen the joints and damage that soft socket.

The IHDI also says the risk is greatest in the first few months of life. By six months the hips are more developed and the ligaments are stronger. That is exactly the swaddling age, so it is worth getting right.

The American Academy of Pediatrics agrees: studies have found that straightening and tightly wrapping a baby's legs can lead to hip dislocation or dysplasia.

The clearest evidence comes from Japan. In 1975 the country ran a national campaign against swaddling babies with their hips and knees held straight. Before it, hip dislocation affected as many as 3.5% of babies; afterwards it fell to under 0.2%, according to the International Hip Dysplasia Institute.

What does hip-healthy swaddling look like?

Do	Don't
Leave the bottom of the swaddle loose, like a pouch	Wrap the legs straight down and tight
Let the legs bend up and out at the hips (frog position)	Press the knees together
Keep it snug only around the chest and arms	Tighten a sleep sack around the thighs
Check the legs can kick and move inside	Use a bag so narrow that the legs are held together
Stop arms-in swaddling once baby tries to roll	Keep swaddling a baby who is rolling

Old advice to wrap the legs straight "so they grow straight" is not supported. Baby's legs straighten on their own as they grow.

How do I check if my swaddle is hip-healthy?

Do this with baby in the swaddle, before every sleep for the first few nights. It takes 10 seconds.

Look at the shape. Baby's knees should sit apart and a little bent, not pressed together.
Feel the bottom. Put your hand inside the lower half. There should be space around the legs.
Watch baby move. Baby should be able to bend and kick the legs freely.

The IHDI notes that even swaddle bags can hold the legs too tightly if they are tightened around the thighs, so check whatever you use.

Is a zip swaddle or a cloth wrap better for hips?

	Cloth wrap	Zip swaddle
Room for the legs	Depends on how you fold the bottom	Built into the shape of the bag
Risk of straight, tight legs	Higher if wrapped the old way	Low, as long as the bag isn't too narrow
Consistency	Changes with whoever wraps	The same every time

Both can be hip-healthy. A cloth wrap needs the bottom folded loosely every time; the IHDI's step-by-step is in our guide to how to swaddle a newborn. A zip swaddle takes the folding out of it, which helps when grandparents or a helper are also putting baby down.

“Material wise i like that it is soft and stretchy not too tight compared to some other brands.”

— A Tinytato parent, about TatoWrap

When should I ask the doctor about baby's hips?

Baby's hips are usually checked at the newborn examination and at early check-ups. Mention it at your next visit to the doctor or Klinik Kesihatan if you notice:

skin creases on the thighs that look uneven between the two legs,
one leg that looks shorter than the other,
one hip that doesn't spread out as far as the other during nappy changes.

Also mention it if baby was breech (bottom first) late in pregnancy, or if there is hip dysplasia in the family. These babies are sometimes offered a hip scan.

Our pick

TatoWrap Bamboo Swaddle (0–3 months), RM119. A zip swaddle that's snug around the arms and roomy at the bottom, so baby's legs can bend up and out. It's the same every time, whoever zips it. Do the 10-second check above on the first night, as with any swaddle.

For 3 to 6 months, TatoWrap+, RM129 is longer, with removable sleeves for when baby starts to roll.

Frequently asked questions about swaddling and baby's hips

Quick answers to what parents ask most.

Is it safe to swaddle a baby's hips?

Yes, if the swaddle is loose around the hips and legs. Only the chest and arms should be snug.

Why is swaddling sometimes not recommended?

Because of three risks when it's done wrong: tight, straight legs (hips), a swaddled baby rolling onto the tummy, and overheating. Avoid all three and swaddling can be safe.

How can I prevent hip dysplasia in my newborn?

You can't prevent every case, because some babies are born with it. You can avoid making it worse: no tight, straight-leg wrapping, carriers that support the thighs in an M-position, and keeping hip checks at your clinic visits.

Does carrying baby affect the hips too?

Yes, the same rule applies. In a carrier, baby's thighs should be supported with the knees a little higher than the bottom. See Are hip seat carriers safe?