Newborn Hip Ultrasound: When to Do It, How It's Performed, and What the Report Means
Hip ultrasound is the most useful examination in the first months of life for early detection of developmental dysplasia of the hip (DDH): a condition in which the joint between the femur and the acetabulum is not perfectly "mature" or stable. Intercepting it early almost always allows for simple and very effective treatments.
When should it (really) be done?
Clarity is needed here, because you can read anything online.
In general:
- Immediately at birth (or before discharge) if clinical examination shows instability (positive or doubtful Ortolani/Barlow maneuvers) or if there are significant risk factors.
- For all newborns within the 6th week (and in any case no later than 8 weeks) according to indications reported in pediatric-orthopedic texts and recommendations.
Useful note: in some countries/guidelines, there is also talk of a "selective" approach (ultrasound only in at-risk babies), because many "immature" hips mature spontaneously very early.
In Italian practice, however, the aim is often to achieve early diagnosis/ultrasound control precisely to reduce late diagnoses and more complex treatments.
What are the main risk factors?
Among the most recognized:
- breech presentation during pregnancy ("seated" baby)
- family history (parent/sibling with DDH)
- clinical instability at neonatal examination
Other elements "to keep an eye on" (less decisive on their own) can be: postural rigidities, intrauterine packaging, twin pregnancy, etc. Here, serial clinical examination is very important.
How the examination is performed
It is a non-invasive, radiation-free, painless ultrasound:
- the newborn is positioned on their side
- a probe with gel is used
- the operator acquires standardized images and measurements (often according to Graf's method)
Typical duration: a few minutes per side (depends on cooperation and technique).
"Report: Graf's method" — translation into parent language
Many reports include a type (Graf) and/or angles (α and β). The simple idea is:
- Mature hip (type I): normal.
- "Immature" hip in the first months (type IIa): this is often a delayed maturation that can resolve, but needs to be checked at the correct times.
- True dysplasia (some IIc/III/IV): requires orthopedic evaluation and treatment (often braces/abductors, if indicated).
👉 The practical point: it's not the word "immature" that decides everything, but the child's age + type + clinical stability + follow-up.
What happens if the ultrasound is "borderline" or positive?
In most cases, management is step-by-step:
- pediatric orthopedic visit with clinical evaluation
- decision between:
- close ultrasound control (if the condition is very mild and compatible with maturation)
- treatment (when necessary) to place the hip in the best position for proper growth
- follow-up until normalization
The goal is to prevent the problem from dragging on and being discovered late, when more invasive procedures may be needed.
5 "red flag" signs not to ignore (even if the ultrasound has not yet been done)
Contact your pediatrician or request an orthopedic evaluation if you notice:
- marked asymmetry of the skin folds (not enough on its own, but if evident, it should be evaluated)
- limitation of abduction (one leg opens less than the other)
- apparent leg length discrepancy
- "click"/sensation of instability reported during examination
- at-risk baby (breech/family history) without a defined pathway
Quick FAQ
Can the ultrasound "be wrong"?
More than "being wrong," it can be affected by technique/positioning. This is why there are recommendations and standards for execution/interpretation.
If I do it too early, do I risk false alarms?
Yes: many hips are physiologically immature in the very first weeks. This is one reason why some guidelines prefer specific timing and selection.
Is an X-ray necessary?
In the first months, ultrasound is the key examination; X-rays become more useful when the ossification nucleus is visible (typically later).
Conclusion
Hip ultrasound is a simple but very important check: performed at the right time and interpreted in the clinical context, it allows for early detection of dysplasia and reduces the risk of late diagnoses.
If you wish, you can book a pediatric orthopedic evaluation (especially in case of risk factors or a doubtful report), in order to set up a clear follow-up pathway.
This article is for informational purposes only and does not replace a medical visit
