My Baby's Hip Click and Ultrasound Results
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published AAP, NIH, Mayo Clinic guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect hip click and ultrasound results, here is what the evidence says.
The short answer
A "hip click" detected during your baby's physical exam may lead to a hip ultrasound to check for developmental dysplasia of the hip (DDH). Ultrasound results describe the hip joint using measurements like the alpha angle (which measures how well-formed the socket is). Normal alpha angles are 60 degrees or more. Mildly immature hips (alpha 50-59 degrees) often improve on their own and are monitored. More significant dysplasia typically requires treatment with a Pavlik harness.
Key takeaways
- A "hip click" detected during your baby's physical exam may lead to a hip ultrasound to check for developmental dysplasia of the hip (DDH). Ultrasound results describe the hip joint using measurements like the alpha angle (which measures how well-formed the socket is). Normal alpha angles are 60 degrees or more. Mildly immature hips (alpha 50-59 degrees) often improve on their own and are monitored. More significant dysplasia typically requires treatment with a Pavlik harness.
- Usually normal when: A "click" at the newborn exam that resolves on follow-up and ultrasound is normal
- Call your doctor if: Your baby in a Pavlik harness seems to have a leg that is not staying in position
- Varies by age — see the age-by-age breakdown below
“Fever itself is not an illness — rather, it is a sign or symptom that the body is fighting an infection. Fever stimulates certain defenses, such as the white blood cells, which attack and destroy invading bacteria.”
This is one of the most common questions parents ask. Searching for answers means you care.
What Parents Should Know
According to AAP, NIH, Mayo Clinic guidelines, a "hip click" detected during your baby's physical exam may lead to a hip ultrasound to check for developmental dysplasia of the hip (DDH). Ultrasound results describe the hip joint using measurements like the alpha angle (which measures how well-formed the socket is). Normal alpha angles are 60 degrees or more. Mildly immature hips (alpha 50-59 degrees) often improve on their own and are monitored. More significant dysplasia typically requires treatment with a Pavlik harness. At 0-6 weeks, hip examinations are performed at birth and at early well visits. Many newborn hips click due to ligament laxity, and most are normal. If your pediatrician detects an unstable hip (Ortolani or Barlow positive), or if risk factors are present (breech position, family history, first-born female), an ultrasound is ordered around 4-6 weeks of age. It is generally considered normal when a "click" at the newborn exam that resolves on follow-up and ultrasound is normal. However, you should contact your pediatrician promptly if your baby in a Pavlik harness seems to have a leg that is not staying in position.
Normal vs. Concerning
By Age
What to expect by age
0-6 weeks
Hip examinations are performed at birth and at early well visits. Many newborn hips click due to ligament laxity, and most are normal. If your pediatrician detects an unstable hip (Ortolani or Barlow positive), or if risk factors are present (breech position, family history, first-born female), an ultrasound is ordered around 4-6 weeks of age.
6 weeks - 3 months
Hip ultrasound is the standard screening tool before 6 months. Results may show: normal (alpha >60 degrees), mildly immature (alpha 50-59), or dysplastic (alpha <50 or other abnormalities). Mildly immature hips are often rechecked in 4-6 weeks, as many mature spontaneously. True dysplasia requires treatment.
3-6 months
If treatment is needed, a Pavlik harness is most effective when started before 6 months. Follow-up ultrasounds track improvement. If the harness is not successful, other bracing options or imaging may be recommended. Compliance with harness wear (typically 23 hours per day) is important for success.
6-12 months
After 6 months, X-rays replace ultrasound for hip imaging as the bones become more calcified. If hip dysplasia was not detected earlier or did not respond to harness treatment, other interventions including closed or open reduction may be needed. Your orthopedist will guide the treatment plan.
12-24 months
Late-detected DDH may present as a limp or leg-length difference once walking begins. Treatment at this age is more complex and may require surgery. This is why early screening and prompt treatment are so important.
What to Tell Your Pediatrician
- Describe when you first noticed hip click and ultrasound results and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you are unsure what your baby's hip ultrasound results mean.
- Mention if your baby has been put in a Pavlik harness and you have questions about care.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- A "click" at the newborn exam that resolves on follow-up and ultrasound is normal
- Hip ultrasound shows alpha angle of 60 degrees or more (mature, normal hip)
- Mildly immature hips that normalize on repeat ultrasound in 4-6 weeks
- You are unsure what your baby's hip ultrasound results mean
- Your baby has been put in a Pavlik harness and you have questions about care
- You notice asymmetric leg folds or limited movement of one hip
- Your baby in a Pavlik harness seems to have a leg that is not staying in position
- A previously stable hip seems to be worsening or your baby develops a sudden limp when learning to walk
What You Can Do at Home
- Keep track of when you notice hip click and ultrasound results — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that a "click" at the newborn exam that resolves on follow-up and ultrasound is normal — this is generally within the range of normal.
- At 0-6 weeks, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
- While monitoring at home, seek immediate care if your baby in a Pavlik harness seems to have a leg that is not staying in position.
Related Conditions
Pavlik Harness for Hip Dysplasia - What to Expect
The Pavlik harness is the standard first-line treatment for developmental dysplasia of the hip (DDH) in babies under 6 months. It holds the hips in a flexed, abducted position to encourage proper socket development. Success rates are 85-95% when started early. The harness is typically worn 23 hours per day for 6-12 weeks, then gradually weaned. Regular follow-up with ultrasound monitors progress. Most babies adapt to the harness within a few days.
When Should My Baby See a Pediatric Orthopedist?
A pediatric orthopedist specializes in bone, joint, and muscle conditions in growing children. Common reasons for referral include hip dysplasia, clubfoot, limb length differences, bowed legs beyond normal range, fractures, scoliosis, limping, and bone or joint abnormalities detected on examination or imaging. These specialists understand how growing bones and joints behave differently from adults.
Related Resources
Frequently asked questions
Is hip click and ultrasound results normal?
When should I call the doctor about hip click and ultrasound results?
When is hip click and ultrasound results normal?
What causes hip click and ultrasound results?
What should I mention to my pediatrician about hip click and ultrasound results?
Is hip click and ultrasound results normal at 0-6 weeks?
Is hip click and ultrasound results normal at 6 weeks - 3 months?
Should I go to the ER for hip click and ultrasound results?
Does hip click and ultrasound results go away on its own?
References
- [1]American Academy of Pediatrics. Clinical Practice Guideline: Early Detection of Developmental Dysplasia of the Hip. Pediatrics, 2000. AAP
- [2]National Library of Medicine. Developmental Dysplasia of the Hip. StatPearls. NIH
- [3]Mayo Clinic. Hip dysplasia. Mayo Clinic
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Baby's Hip Click and Ultrasound Results.
Things to mention
- Describe when you first noticed hip click and ultrasound results and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you are unsure what your baby's hip ultrasound results mean.
- Mention if your baby has been put in a Pavlik harness and you have questions about care.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You are unsure what your baby's hip ultrasound results mean
- Your baby has been put in a Pavlik harness and you have questions about care
- You notice asymmetric leg folds or limited movement of one hip
Urgent signs to report immediately
- Your baby in a Pavlik harness seems to have a leg that is not staying in position
- A previously stable hip seems to be worsening or your baby develops a sudden limp when learning to walk
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of hip click and ultrasound results are normal. Talk to your pediatrician if your baby in a pavlik harness seems to have a leg that is not staying in position.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
Was this page helpful?
Related Medical Concerns
Pavlik Harness for Hip Dysplasia - What to Expect
The Pavlik harness is the standard first-line treatment for developmental dysplasia of the hip (DDH) in babies under 6 months. It holds the hips in a flexed, abducted position to encourage proper socket development. Success rates are 85-95% when started early. The harness is typically worn 23 hours per day for 6-12 weeks, then gradually weaned. Regular follow-up with ultrasound monitors progress. Most babies adapt to the harness within a few days.
When Should My Baby See a Pediatric Orthopedist?
A pediatric orthopedist specializes in bone, joint, and muscle conditions in growing children. Common reasons for referral include hip dysplasia, clubfoot, limb length differences, bowed legs beyond normal range, fractures, scoliosis, limping, and bone or joint abnormalities detected on examination or imaging. These specialists understand how growing bones and joints behave differently from adults.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.
Adenoid Hypertrophy and Breathing
Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.
Adrenoleukodystrophy (ALD) in Babies
X-linked adrenoleukodystrophy (X-ALD) is a genetic disorder affecting about 1 in 17,000 newborns, caused by mutations in the ABCD1 gene on the X chromosome. It primarily affects boys and impairs the breakdown of very long-chain fatty acids (VLCFAs), which accumulate and damage the myelin sheath in the brain and the adrenal glands. The most severe form, cerebral ALD, typically affects boys between ages 4-10 with rapid neurological decline. Newborn screening now enables early detection, and hematopoietic stem cell transplant or gene therapy performed before significant brain involvement can be life-saving.