Hip Dysplasia in a Newborn: What Parents Need to Know About Developmental Dysplasia of the Hip
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Developmental dysplasia of the hip, or DDH, means a baby's hip joint has not developed normally. The hip may simply be shallow or loose, or the ball at the top of the thigh bone may partially or completely come out of the socket.
Pediatricians check newborn hips because early detection makes treatment easier and can reduce the chance of more complicated treatment later.
- DDH includes a spectrum from a shallow hip socket to an unstable or dislocated hip.
- Many newborns with DDH have no symptoms that parents can see.
- Pediatricians examine the hips repeatedly during infancy.
- Breech positioning late in pregnancy and a family history of DDH are important risk factors.
- Girls are affected more often than boys.
- Not every baby needs a hip ultrasound.
- When imaging is needed, ultrasound is commonly used in younger infants and X-rays become more useful later.
- Early DDH can often be treated with a brace such as a Pavlik harness.
One of the things your pediatrician checks during a newborn examination is something parents may barely notice: how the baby's hips move.
That examination is looking for developmental dysplasia of the hip, usually called DDH.
A hip does not have to be completely dislocated to have DDH. Sometimes the socket is simply too shallow. In other babies, the hip is loose or unstable and can move partly or completely out of position.
Because babies with DDH can look completely normal, careful examination and appropriate follow-up are important.
What Is Developmental Dysplasia of the Hip?
The hip is a ball-and-socket joint.
The rounded top of the thigh bone—the femoral head—normally sits securely inside a cup-shaped socket called the acetabulum.
With DDH, the socket may be too shallow or the ball may not sit securely inside it.
The condition ranges from mild dysplasia to an unstable, partially displaced, or completely dislocated hip.
Is a Dislocated Hip Always Obvious?
No.
A newborn with hip dysplasia may look entirely normal to a parent.
There may be no crying, swelling, redness, or obvious pain.
That is one reason hip examinations are part of routine newborn and infant care rather than something performed only when symptoms appear.
How Does a Pediatrician Check a Newborn's Hips?
During the physical examination, the pediatrician gently moves the hips to assess their stability and range of motion.
Two examination techniques traditionally used during early infancy are called the Ortolani and Barlow maneuvers.
The Ortolani maneuver helps detect a hip that is displaced but can be gently returned into the socket. The Barlow maneuver assesses whether an unstable hip can move out of the socket.
As infants get older, limited or asymmetric hip abduction becomes an increasingly important examination finding.
Parents sometimes assume that if the newborn hip examination was normal, DDH is permanently ruled out.
That isn't quite how screening works. The hips are checked repeatedly during infancy because no single examination or screening method identifies every child who will eventually develop clinically important dysplasia.
Which Babies Are at Higher Risk?
DDH can occur without any identifiable risk factor, but certain babies are more likely to develop it.
Important risk factors include:
- Breech presentation during the third trimester
- A close family history of developmental hip dysplasia
- A previous abnormal or unstable hip examination
- Female sex
- Tight lower-extremity swaddling that forces the hips and knees straight
Breech positioning is particularly important. The AAP notes that it is one of the strongest recognized DDH risk factors, regardless of whether the baby was ultimately delivered vaginally or by cesarean section. :contentReference[oaicite:1]{index=1}
Does Every Breech Baby Need a Hip Ultrasound?
Babies with breech positioning late in pregnancy commonly receive additional hip imaging even when the newborn examination is normal.
The exact timing and type of imaging can vary according to your pediatrician, local pediatric orthopedic protocols, and available imaging expertise.
The AAP supports selective imaging before 6 months for higher-risk infants such as babies with third-trimester breech presentation, family history, previous clinical instability, or a suspicious examination. :contentReference[oaicite:2]{index=2}
Why Doesn't Every Newborn Get a Hip Ultrasound?
Universal ultrasound screening is not routinely recommended in the United States.
Very young newborn hips can appear immature on ultrasound even when they will become completely normal without treatment.
Screening every infant can therefore identify abnormalities that would resolve naturally and potentially lead to unnecessary follow-up or treatment.
Physical examination remains the primary screening method, with imaging added when the examination or risk factors justify it. :contentReference[oaicite:3]{index=3}
When Is Ultrasound Usually Done?
In infants who have risk factors but a normal physical examination, diagnostic hip ultrasound is often deferred until around 6 weeks of age.
Waiting allows some physiologic hip immaturity present immediately after birth to resolve naturally and reduces false-positive findings.
Ultrasound may be performed earlier when the hip examination itself is clearly abnormal and imaging is needed to guide treatment.
After roughly 4–6 months, a pelvic X-ray often becomes more useful because the hip bones have developed enough to be seen more clearly on radiographs. :contentReference[oaicite:4]{index=4}
- Keep all scheduled newborn and well-child visits so your baby's hips can be examined repeatedly.
- Tell your pediatrician if your baby was breech during the third trimester.
- Tell your pediatrician about any close relatives who had hip dysplasia or treatment for abnormal hips during childhood.
- Complete any recommended ultrasound, X-ray, or pediatric orthopedic follow-up.
- Use hip-healthy swaddling that allows the hips and knees to bend and move freely.
- Do not tightly wrap your baby's legs straight together.
Can Swaddling Cause Hip Problems?
Improper swaddling can increase the risk of hip dysplasia.
The concern is not swaddling itself. The concern is wrapping the lower body so tightly that the baby's legs are forced straight and pressed together.
A hip-healthy swaddle allows room for the baby's hips and knees to bend upward and outward naturally.
Does Double Diapering Treat Hip Dysplasia?
No.
Double diapering has historically been suggested as a way of keeping the legs farther apart, but it is not an effective treatment for developmental hip dysplasia.
A baby diagnosed with DDH should receive appropriate pediatric orthopedic evaluation rather than relying on diaper positioning.
How Is Hip Dysplasia Treated?
Treatment depends on the baby's age and the severity and stability of the hip abnormality.
In young infants who need treatment, a soft positioning brace called a Pavlik harness is commonly used.
The harness keeps the hips flexed and positioned in a way that helps the femoral head remain properly seated in the hip socket while development continues.
Pediatric orthopedic specialists monitor the baby's hip position and development during treatment.
Will My Baby Need Surgery?
Many babies diagnosed early can be treated successfully without surgery.
When bracing does not work, when the hip cannot be positioned appropriately, or when DDH is diagnosed later, treatment may require casting or surgery.
This is one reason early diagnosis is valuable: treatment generally becomes more complicated as a child grows and the hip remains abnormal. :contentReference[oaicite:5]{index=5}
What Might Parents Notice as a Baby Gets Older?
DDH is often detected by medical examination before parents notice anything.
As babies get older, possible findings can include:
- One hip that does not open outward as far as the other
- An apparent difference in leg length
- Asymmetry in movement of the legs
- A limp once walking begins
- A waddling gait with more significant bilateral involvement
Uneven skin folds by themselves are not a reliable way to diagnose DDH, but any persistent asymmetry or parental concern should be discussed with the pediatrician.
When Should I Call My Pediatrician?
Contact your pediatrician if:
- Your baby was breech in the third trimester and you are unsure about recommended hip imaging.
- A parent, sibling, or close relative had developmental hip dysplasia.
- You notice that one hip does not open outward as far as the other.
- One leg appears shorter than the other.
- Your baby's leg movements seem consistently asymmetric.
- You were told the newborn hip examination was abnormal or uncertain and follow-up has not yet been arranged.
- You have any concern about your baby's hip movement or development.
The AAP specifically includes parental concern and suspicious or inconclusive examinations among reasons to consider further evaluation or imaging. :contentReference[oaicite:6]{index=6}
Is Hip Dysplasia an Emergency?
Typical developmental hip dysplasia is usually not an emergency and does not cause an otherwise healthy newborn to become suddenly ill.
Seek prompt medical evaluation if your baby develops:
- Sudden severe pain with movement of a leg
- A leg that suddenly will not move normally
- Significant swelling, redness, or warmth around a hip
- Fever with apparent hip or leg pain
- A recent injury followed by abnormal leg movement
- Any appearance of being seriously ill
These findings are not typical of uncomplicated DDH and may indicate a different medical problem requiring prompt evaluation.
Frequently Asked Questions
Is hip dysplasia the same as a dislocated hip?
Not always. DDH describes a spectrum. Some babies have a shallow socket or unstable hip without complete dislocation, while others have a hip that is partly or completely out of the socket.
Does DDH hurt a newborn?
Usually not. Most newborns with DDH do not appear to be in pain, which is one reason routine screening examinations are important.
Does a C-section prevent hip dysplasia in a breech baby?
No. Breech positioning itself is an important risk factor. A baby who was breech late in pregnancy may still need selective hip imaging even if delivery was by cesarean section. :contentReference[oaicite:7]{index=7}
Can a normal newborn examination miss DDH?
Yes. No screening method detects every case. That is why hip examination continues during routine infant visits and why higher-risk babies may receive additional imaging. :contentReference[oaicite:8]{index=8}
Will my baby have long-term hip problems?
Many babies diagnosed and treated early develop normally. Untreated significant DDH can eventually affect hip function and contribute to gait problems and premature joint disease, which is why appropriate follow-up matters.
Can I carry my baby normally?
Yes, unless your pediatric orthopedic specialist gives you specific restrictions. When carrying or using a baby carrier, positions that allow the hips to remain flexed and naturally spread are generally preferable to positions that force the legs straight together.
Hip dysplasia is a good example of why routine pediatric examinations matter even when a baby looks completely healthy.
Parents often cannot see DDH, and babies usually do not act as though anything hurts. Repeated hip examinations, attention to risk factors such as breech positioning, and timely imaging when indicated give us the best chance of finding it early.
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Join the Parent Club →References & Medical Sources
- American Academy of Pediatrics. Evaluation and Referral for Developmental Dysplasia of the Hip in Infants
- American Academy of Pediatrics, AAP News. Report Recommends Changes in Screening for Developmental Dysplasia of the Hip
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Medical Disclaimer
This article provides general educational information and is not a substitute for medical advice, diagnosis, or treatment from your child's pediatrician, pediatric orthopedic specialist, or another qualified healthcare professional. Developmental dysplasia of the hip can range from mild socket shallowness to an unstable or dislocated hip, and evaluation depends on physical examination, age, risk factors, and appropriate imaging when indicated. Keep scheduled newborn and well-child visits and complete any recommended imaging or specialty follow-up. Sudden severe leg pain, inability to move a leg normally, swelling, redness, fever, injury, or an ill-appearing baby is not typical of uncomplicated DDH and requires prompt medical evaluation.