Hip Dysplasia in Infants: Spotting It Before It’s Too Late
Every newborn’s hip joints are still developing, and in some babies that process doesn’t go as it should. Hip dysplasia occurs when the socket of the hip joint is too shallow to hold the ball of the femur securely in place, leaving the joint unstable or, in severe cases, fully dislocated. It is one of the most common musculoskeletal conditions in newborns, and babies born in breech position, diagnosed with torticollis, or delivered under difficult circumstances face a significantly higher risk. When caught early, treatment is simple and highly effective. When missed, the consequences can follow a child for life. This guide covers what hip dysplasia looks like, what causes it, how it connects to other birth injuries, and what options families have when a delayed diagnosis causes preventable harm.
What Is Hip Dysplasia in Infants?
Hip dysplasia is a structural problem with the hip joint that can range from a mild looseness to a complete dislocation. To understand what goes wrong, it helps to know how a healthy hip forms, what the different levels of severity look like, and which babies are most likely to develop the condition in the first place.
How the Hip Joint Develops
A baby’s hip is a ball-and-socket joint. The rounded top of the femur (the ball) sits inside a cup-shaped part of the pelvis called the acetabulum (the socket). In a healthy hip, the socket is deep enough to hold the ball firmly in place while still allowing a wide range of motion. In newborns, much of this joint is still made of soft cartilage rather than bone, which means it is still actively forming and vulnerable to outside forces.
When something disrupts that development, the socket can end up too shallow or angled incorrectly. Without a deep enough socket to hold it, the femoral head can slip partially or fully out of position. The longer the joint stays in this unstable state, the harder it becomes for the socket to develop normally on its own, which is why early detection and treatment are so critical during the first few months of life.
Types and Severity
Hip dysplasia exists on a spectrum. At the mildest end, acetabular dysplasia means the socket is shallow, but the femoral head remains in place. The joint is stable enough to function but may not develop properly without intervention. Subluxation is more serious, where the ball is partially displaced from the socket and moves in and out of position with certain movements.
Full dislocation is the most severe form. The femoral head sits entirely outside the socket, and the joint has no functional contact between the two surfaces. In some cases the dislocation is present at birth, while in others the joint gradually worsens over the first weeks or months. The severity directly determines the treatment path. Mild cases may resolve with monitoring alone, while subluxation and dislocation almost always require bracing, and late-caught dislocations frequently require surgery.
Who Is at Risk?
The single biggest risk factor is breech positioning in the womb. Babies who spend the final weeks of pregnancy with their legs extended upward against their body face sustained pressure on the hip joints that can prevent the socket from forming correctly. The frank breech position carries the highest risk, since this position locks the hips in flexion with the knees straight, placing the most direct and prolonged force on the joint.
Other risk factors include being female (girls are two to four times more likely to develop hip dysplasia than boys), being a first-born child, having a family history of the condition, and low amniotic fluid levels that restrict fetal movement. Babies diagnosed with congenital torticollis should also be screened, as roughly one in five of them will have some degree of hip involvement. When multiple risk factors overlap, the likelihood increases significantly, and providers should be ordering imaging rather than relying on physical exams alone.
Recognizing the Signs of Hip Dysplasia
Hip dysplasia does not always announce itself in obvious ways, especially in the first few weeks of life. Some signs are physical and visible during everyday activities like diaper changes, while others only become apparent as your baby grows and begins reaching movement milestones. Understanding what to look for at home and what your pediatrician should be checking for at every visit can make the difference between a simple fix and a complicated one.
What Parents Should Watch For
One of the earliest clues is asymmetry. During diaper changes, parents may notice that one leg does not open as wide as the other or that the skin folds on the inner thighs do not line up evenly. A clicking or clunking sensation when moving the baby’s legs is another common indicator, though not all clicks point to dysplasia. Some babies will show a noticeable difference in leg length when their knees are bent and held together.
As the baby gets older, the signs can become more behavioral. A baby with an unstable or dislocated hip may resist certain positions, fuss during swaddling, or seem uncomfortable when their legs are brought together. If you notice your baby consistently favoring one side during movement or appearing stiff in one hip, bring it up with your pediatrician rather than waiting for the next scheduled visit.
Developmental Milestones to Monitor
Hip dysplasia can quietly interfere with your baby’s ability to hit key movement milestones on schedule. Signs of developmental delay in newborns and young infants, such as asymmetrical crawling, reluctance to bear weight evenly on both legs, or a noticeable limp once the child starts pulling up and walking, can all point to an undiagnosed hip problem. A baby who scoots or bunny-hops instead of crawling symmetrically may be compensating for instability or discomfort in one hip.
Parents should pay close attention to how their baby moves between four and twelve months, as this is when the impact of an unstable hip becomes most visible. If your child is consistently behind on rolling, sitting, or standing compared to typical timelines, hip dysplasia should be on the list of possible causes. Early intervention at this stage can still lead to excellent outcomes, but the window narrows with every month that passes.
How Doctors Screen and Diagnose
Pediatricians are trained to check for hip dysplasia at every well-baby visit during the first year. The two standard physical tests are the Ortolani maneuver, which attempts to guide a dislocated hip back into the socket, and the Barlow maneuver, which tests whether the hip can be pushed out of position. Both are performed by gently manipulating the baby’s legs and feeling for a clunk or shift in the joint.
Physical exams alone are not always reliable, particularly in mild cases or in babies older than a few months. For babies with known risk factors such as breech positioning, family history, or a torticollis diagnosis, the standard of care calls for an ultrasound by four to six weeks of age. After four to six months, X-rays become the preferred imaging tool because the hip has begun to ossify and shows up more clearly on film. The key is that at-risk babies should never leave a well-baby visit without either a clean physical exam or a referral for imaging. When providers skip this step, treatable cases slip through the cracks.
Hip Dysplasia and Related Birth Injuries
Hip dysplasia does not always develop in isolation. The same conditions that put a baby’s hips at risk during pregnancy and delivery often affect other parts of the body as well. Two of the most common overlaps involve breech positioning and torticollis, and understanding these connections helps parents and providers catch problems that might otherwise go unnoticed.
The Connection Between Breech Positioning and Hip Dysplasia
Babies who remain in breech position during the final weeks of pregnancy are significantly more likely to develop hip dysplasia than babies who are head-down at delivery. The reason is mechanical. When a baby’s legs are folded upward against the body for an extended period, the sustained pressure prevents the hip socket from deepening the way it normally would. Frank breech, where the legs are extended straight up with the feet near the head, puts the most direct strain on the joint and carries the highest risk.
This connection is well established enough that breech positioning alone is considered grounds for a hip ultrasound, regardless of whether the physical exam reveals any abnormality. Providers who deliver or treat breech babies and fail to order imaging are missing a basic screening step. The risk does not disappear after a successful delivery either. Even babies who are turned before birth or delivered by cesarean section after being breech still carry an elevated risk, because the damage to the developing socket may have already occurred during the weeks spent in that position.
When Torticollis and Hip Dysplasia Occur Together
Research consistently shows that infants diagnosed with torticollis should be screened for hip dysplasia as a matter of course. Studies put the overlap at roughly 15 to 20 percent, meaning that for every five babies with torticollis, at least one is likely to have some degree of hip involvement. The two conditions share a common root in many cases: abnormal fetal positioning that simultaneously compresses the neck muscles and restricts normal hip joint development.
Despite this well-documented relationship, screening for hip dysplasia is not always automatic when torticollis is diagnosed. Parents whose baby is being treated for torticollis should ask directly whether a hip evaluation has been performed. If the answer is no, request an ultrasound. The cost of catching it late is steep. A baby who could have been treated with a soft harness at two months may instead need surgery and casting at twelve months simply because no one checked the hips when the torticollis was first identified.
Treatment and Recovery
The treatment path for hip dysplasia depends almost entirely on when the condition is caught. Proper hip development in infants requires the femoral head to sit securely in the socket, and the longer it stays out of position, the more intervention is needed to correct it. Babies diagnosed in the first few months typically need nothing more than a soft brace, while those diagnosed later may face casting, closed reduction, or open surgery. Understanding what each stage of treatment involves and what the long-term outlook looks like can help parents prepare for what lies ahead.
Early Intervention: The Pavlik Harness
The Pavlik harness is the first-line treatment for hip dysplasia diagnosed before six months of age. It is a soft brace that holds the baby’s legs in a flexed, outward position, keeping the femoral head seated in the socket while the joint continues to develop. Most babies wear it full-time for six to twelve weeks, followed by a period of part-time wear as the hip stabilizes. Success rates are high when treatment begins early, with studies showing resolution in roughly 85 to 95 percent of cases.
The harness can be an adjustment for both baby and parents. Diaper changes, bathing, and dressing all require some adaptation, and it can be difficult to see your baby in a brace around the clock. But the tradeoff is significant. A few months in a Pavlik harness is a far easier path than the surgical alternatives that come into play when the diagnosis is delayed. Parents should follow up regularly with their orthopedic specialist during this period to confirm the hip is responding and the harness fit remains correct.
When More Aggressive Treatment Is Needed
If the Pavlik harness does not produce results, or if the dysplasia is caught after six months, the treatment escalates. Closed reduction is a procedure performed under general anesthesia in which the doctor manually guides the femoral head back into the socket. The baby is then placed in a spica cast, a rigid body cast that holds the hips in the correct position for several weeks to allow the joint to stabilize.
In the most severe cases, or when closed reduction fails, open surgery becomes necessary. The surgeon repositions the femoral head and may reshape the socket to provide better coverage. Some children require additional procedures as they grow, including osteotomies to realign the bones of the hip. Recovery from surgery involves casting, physical therapy, and months of restricted activity. The contrast between this path and early harness treatment is stark, and it is often the difference between a diagnosis made at two months and one made at twelve.
Long-Term Outlook
Babies whose hip dysplasia is caught and treated early have an excellent prognosis. A Pavlik harness applied in the first few months gives the joint the positioning it needs to stabilize, and most children go on to have full range of motion with no lasting effects. Regular follow-up imaging through early childhood confirms the joint is maturing properly, and most kids are discharged from orthopedic care before they start school.
The picture changes significantly for late diagnoses. Children who undergo surgical correction face a higher risk of complications, including avascular necrosis, where reduced blood flow damages the femoral head, and residual dysplasia that may require further intervention. Even with successful surgery, the long-term risk of early-onset osteoarthritis is elevated. Adults who had untreated or late-treated hip dysplasia are among the most common candidates for hip replacement before the age of 50. These outcomes are preventable in the vast majority of cases, which is what makes early and consistent screening so important.
When a Missed Diagnosis Becomes Medical Malpractice
Hip dysplasia is one of the most screenable conditions in pediatric medicine. The tools exist, the risk factors are well known, and the guidelines are clear. When a provider fails to follow them and a child suffers as a result, that is not just an unfortunate outcome. It may be medical malpractice. Understanding what your doctor should have done, how a missed diagnosis directly harms your child, and what legal options are available can help you decide how to move forward.
The Standard of Care for Screening
Pediatricians are expected to perform a physical hip examination at every well-baby visit during the first year of life. The Ortolani and Barlow maneuvers are standard, and any instability, clicking, or asymmetry should prompt further evaluation. For babies with known risk factors like breech positioning, family history, torticollis, or female sex, the standard of care goes further. Guidelines call for a hip ultrasound by four to six weeks of age, even if the physical exam appears normal, because mild dysplasia can be difficult to detect by hand alone.
The most common breakdown happens when a provider recognizes a risk factor but does not follow through with imaging. A baby born in frank breech who never receives an ultrasound, or a baby diagnosed with torticollis whose hips are never checked, represents a clear departure from what the medical community expects. Documenting these failures is often straightforward because the risk factors are right there in the medical record, and the absence of a referral or imaging order speaks for itself.
How Delayed Diagnosis Harms Your Child
The difference between an early and late diagnosis is not just a matter of inconvenience. A baby diagnosed at six weeks wears a Pavlik harness for a few months and moves on with normal development. A baby diagnosed at twelve months or later may need closed reduction under anesthesia, months in a rigid spica cast, or open surgery to rebuild the hip socket. Each of these carries real risks, including infection, avascular necrosis, and the need for repeat procedures as the child grows.
Beyond the immediate medical consequences, a late diagnosis can affect a child’s development for years. Months spent in a cast or recovering from surgery mean months of missed movement milestones. The psychological toll on both child and family is significant, and the financial burden of surgical intervention, extended physical therapy, and ongoing orthopedic care can be enormous. None of this had to happen if the provider had simply ordered the screening that the situation called for.
Why the Right Attorney Makes All the Difference
If your child’s hip dysplasia was missed because a provider failed to follow basic screening guidelines, Joseph Lichtenstein has the experience to hold them accountable. With over 30 years in medical malpractice and birth injury litigation, he has secured multiple seven and eight-figure verdicts, including a $47 million award. Named New York’s Medical Malpractice Attorney of the Year in 2019, 2023, and 2024, he routinely wins cases that other firms have turned away. Contact the Law Offices of Joseph Lichtenstein today for a free consultation.