Hip Screening Ultrasound Follow-Up
The short answer
A hip ultrasound may be recommended for your baby based on risk factors for developmental dysplasia of the hip (DDH), including breech presentation, family history of DDH, or findings on physical exam. The ultrasound is painless and helps ensure the hips are developing normally. Early detection and treatment of DDH leads to excellent outcomes.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
Hip ultrasounds are typically ordered at 4-6 weeks of age. They may be recommended for: breech presentation at any point in the third trimester, family history of DDH (especially in a parent or sibling), clinical hip exam findings (instability, limited abduction, asymmetric skin folds), or swaddling concerns. The ultrasound is painless and takes about 10-15 minutes. It shows the hip joint in detail and can detect dysplasia before it becomes clinically apparent. If the ultrasound is normal, no further screening is needed.
If the hip ultrasound shows mild immaturity (Graf type IIa in babies under 3 months), repeat imaging may be recommended in 4-6 weeks, as many of these hips mature on their own. If dysplasia is confirmed, treatment with a Pavlik harness is typically started. The harness is most effective when started early (before 6 months).
If the ultrasound was normal at 6 weeks, no further hip screening is needed unless new concerns arise. If treatment was started, follow-up imaging monitors progress. After about 4-6 months of age, X-rays replace ultrasound for hip assessment.
Your pediatrician continues to check hips at well-child visits. If DDH was treated and resolved, periodic follow-up may continue to ensure normal hip development as your baby begins to stand and walk.
What Should You Do?
When to take action
- Hip ultrasound shows normal development (Graf type I)
- Physical exam shows stable, equal hips
- Baby moves both legs freely and equally
- Your baby has risk factors for DDH and you want to ensure screening has been ordered
- You notice asymmetric leg folds or limited hip movement during diaper changes
- You have questions about the ultrasound results
- Baby suddenly stops moving one leg or seems in pain with hip movement
- A hip clunk is detected on physical exam requiring urgent specialist referral
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
Baby Hip Dysplasia (Hip Click)
Developmental dysplasia of the hip (DDH) is a condition where the hip joint does not form properly, ranging from mild looseness to complete dislocation. It occurs in about 1 in 1,000 births and is more common in firstborns, girls, breech babies, and those with a family history. When caught early, treatment with a soft brace (Pavlik harness) is highly effective.
Hip Clicks During Diaper Changes
Soft clicking sounds from your baby's hips during diaper changes or leg movements are very common and usually harmless. These clicks are typically caused by ligaments and tendons snapping over the joint and are different from a true hip "clunk," which may indicate hip instability. Your pediatrician checks the hips at every well-child visit.
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.
How to Advocate for Your Child's Needs
You know your child better than anyone, and your observations matter. If you feel something is not right with your child's development or health, you have every right to ask questions, request evaluations, and seek second opinions. Advocating for your child is not being difficult - it is being a good parent.