Hip dysplasia is one of the most commonly screened conditions in newborns and for good reason. When detected early, most babies go on to develop healthy hips with no long term complications. When left undetected, however, it can lead to pain, mobility issues, or joint problems later in life.
This guide explains what hip dysplasia is, how common it is, the signs to watch for in babies, how it’s treated, and how everyday choices like positioning, swaddling, and babywearing can support healthy hip development.
What Is Hip Dysplasia?
Hip dysplasia, also called developmental dysplasia of the hip (DDH) is a condition where a baby’s hip joint doesn’t form properly.
The hip is a ball and socket joint:
The ball is the top of the thigh bone (femur)
The socket is part of the pelvis (acetabulum)
Hip dysplasia occurs when:
The socket is too shallow
The ball doesn’t sit securely in the socket
The joint is loose or unstable
You may also hear the terms congenital hip dysplasia or developmental hip dysplasia, but they all refer to the same condition.
How Common Is Hip Dysplasia in Infants?
Hip dysplasia is relatively common:
About 1 in 1,000 babies are diagnosed with hip dysplasia
A higher percentage may show temporary hip instability shortly after birth
Most cases are identified before 6 months of age during routine baby visits
Early diagnosis makes treatment simpler and more effective.
Signs of Hip Dysplasia in Newborns and Infants
Many babies with hip dysplasia don’t show obvious symptoms, which is why routine screening is so important.
Possible Signs Parents May Notice
One leg appears longer than the other
Uneven thigh or buttock creases
Limited movement on one side
One leg turns outward more than the other
Baby favors one side when kicking
If you notice any of these signs, contact your healthcare provider for evaluation.
What Causes Hip Dysplasia?
Hip dysplasia doesn’t have a single cause. Several factors can increase risk.
Common Risk Factors
First born babies
Babies assigned female at birth
Breech positioning during pregnancy
Family history of hip dysplasia
Tight swaddling that forces legs straight and together
During pregnancy, babies naturally sit with hips bent and legs spread. After birth, forcing the legs into a straight position for long periods can interfere with healthy hip development.
How Is Hip Dysplasia Diagnosed?
Healthcare providers screen for hip dysplasia:
At birth
At every routine well baby visit
Diagnostic Tools May Include
Physical examination
Ultrasound (commonly used under 6 months)
X-rays (used for older infants and children)
Treatment Options for Hip Dysplasia
Treatment depends on your baby’s age and the severity of the condition.
Pavlik Harness (Most Common for Infants)
For babies under 6 months, treatment often involves a Pavlik harness. This soft brace holds the hips in a bent, spread position sometimes called the “frog” or “M” position to guide healthy joint development.
Additional Treatment Options
Physical therapy
Casting
Surgery (rare and usually for older children)
Most babies treated early recover fully with no long-term effects.
Can Baby Carriers Cause Hip Dysplasia?
This is a common concern among parents. Baby carriers do not cause hip dysplasia when used correctly. In fact, many orthopedic specialists support babywearing when the carrier promotes healthy hip positioning.
A hip healthy carrier supports:
Legs spread apart
Knees higher than the bottom
A natural curve of the spine
The International Hip Dysplasia Institute (IHDI) recognizes carriers that support this positioning as hip healthy.
How Babywearing Can Support Healthy Hip Development
When used properly, ergonomic babywearing:
Encourages natural hip flexion and positioning
Allows gentle movement that activates muscles
Supports blood flow and joint development
Avoids prolonged straight leg positioning
Many ergonomic baby carriers are also designed using principles recognized by organizations such as the AGR (Campaign for Healthier Backs), which evaluates products for back friendly support for caregivers benefiting both parent comfort and baby positioning.
Swaddling and Hip Dysplasia
Swaddling has been practiced for many years to help sooth babies and promote better sleep, some concerns about its impact on hip health still linger. While it might sound like an old wives’ tale, there is real evidence that tight swaddling with the legs extended and pressed together can increase the risk of developmental dysplasia of the hip (DDH).
The problem isn’t swaddling itself, but how you swaddle. When a baby’s legs are straightened and held tightly together, it can push the femoral head out of alignment with the hip socket especially in the first few months when the joints are still forming.
To safely swaddle and protect your baby’s hips:
Allow room for the legs to bend and move naturally
Choose a hip healthy swaddle design that lets the legs rest in a froggy or “M” position
Avoid wrapping legs tightly together or forcing them to extend downward
Many pediatricians and orthopedic experts now recommend “hip-safe” swaddling techniques or using certified swaddles that allow for natural hip movement
Outlook for Babies with Hip Dysplasia
When treated early:
Most babies develop normal hip function
Long term complications are uncommon
Risk of arthritis or mobility issues later in life is greatly reduced
When Should Parents Contact a Healthcare Provider?
Contact your provider if:
You notice uneven leg movement or creases
Your baby seems uncomfortable moving one leg
You have concerns about positioning or swaddling
There is a family history of hip dysplasia
Supporting Healthy Hip Development from Day One
Hip dysplasia can sound intimidating, but it’s a well understood and highly treatable condition, especially when caught early by:
Attending regular checkups
Practicing hip safe swaddling
Using ergonomic baby carriers correctly
Following guidance from healthcare professionals
Parents can feel confident they’re supporting healthy hip development from the very beginning.
