Congenital Hip Dysplasia - Symptoms, Causes, Treatment & Prevention

📅 Updated: May 2026 ⏱️ 6 min read ✅ Medically reviewed
```html Congenital Hip Dysplasia – Comprehensive Medical Guide

Overview

Congenital hip dysplasia (CHD), also called developmental dysplasia of the hip (DDH), is a spectrum of disorders in which the infant’s hip joint is abnormally formed. The acetabulum (hip socket) may be shallow, the femoral head (ball) may be partially or completely dislocated, or the joint may be unstable. Although the term “congenital” suggests the condition is present at birth, many cases become apparent in the first few months of life as the baby’s hips begin to move.

CHD can affect any infant, but it is more common in certain populations:

  • Females are affected 4–5 times more often than males.
  • First‑born children have a slightly higher risk.
  • Infants with breech presentation, especially frank breech, have a 2–4 % risk compared with <0.5 % in vertex births.1
  • Certain ethnic groups (e.g., Native Americans, Scandinavians) show higher prevalence, while African‑American infants have lower rates.2

Worldwide prevalence ranges from 0.1 % to 2 % of live births, depending on screening practices and population genetics.3

Symptoms

The early signs of CHD can be subtle. Parents and clinicians should look for the following:

  • Asymmetrical thigh or buttock folds – one side may appear higher or tighter.
  • Limited hip abduction – when the infant’s legs are spread apart, one leg may not open as far as the other.
  • Positive Ortolani click – a palpable “clunk” when the hip is gently reduced during a physical exam (indicates a dislocatable hip).
  • Positive Barlow test – the examiner can push the hip out of the socket, indicating instability.
  • Leg length discrepancy – the affected leg may appear shorter.
  • Gait abnormalities (in older children) – limp, waddling gait, or “hip click” heard during walking.
  • Pain or discomfort – uncommon in newborns but may appear in toddlers as the joint deteriorates.
  • Delayed motor milestones – difficulty sitting, crawling, or walking.

When symptoms are present after the first year of life, they often include persistent pain, clicking sounds, and limited range of motion.

Causes and Risk Factors

The exact cause of CHD is multifactorial, involving genetic, mechanical, and hormonal influences:

Genetic Factors

  • Familial clustering suggests autosomal‑dominant inheritance with variable penetrance.4
  • Specific gene variants (e.g., GDF5, COL2A1) have been linked to abnormal cartilage formation.

Mechanical Factors

  • Breech presentation – especially frank breech, where the hips are flexed and extended, stretches the developing joint.
  • Uterine constraint – multiple gestation, oligohydramnios, or a small pelvis can limit fetal movement.
  • Early swaddling with hips forced into extension and adduction increases risk, particularly in cultures where tight swaddling is common.

Hormonal Factors

  • Maternal estrogen and relaxin may increase ligamentous laxity in the fetus, making the hip more susceptible to subluxation.

Additional Risk Factors

  • Family history of CHD or other hip abnormalities.
  • Female sex (higher ligamentous laxity).
  • First‑born status (tight uterine muscles).
  • Associated conditions such as torticollis, foot deformities (metatarsus adductus), or syndromes (e.g., Marfan, Ehlers‑Danlos).

Diagnosis

Early detection dramatically improves outcomes. Diagnosis combines careful clinical examination with imaging studies.

Physical Examination

  • Ortolani maneuver – performed in newborns; a “clunk” suggests a dislocatable hip.
  • Barlow maneuver – attempts to dislocate an unstable hip.
  • Assessment of hip abduction, thigh folds, and leg length.

Imaging

  1. Ultrasound (preferred for infants <6 months):
    • Graf method measures α‑angle and β‑angle to grade dysplasia.
    • Dynamic ultrasound assesses hip stability during gentle stress.
  2. Plain radiography (used after ~4–6 months when the femoral head ossifies):
    • Acetabular index, femoral head‑acetabular distance, and Shenton’s line are evaluated.
  3. MRI – reserved for complex or surgically resistant cases to visualize cartilage and soft‑tissue structures.

Screening Guidelines

Most countries recommend universal clinical screening at birth and repeat examination at 4–6 weeks. Infants with risk factors (breech, family history) receive routine ultrasound regardless of physical findings (e.g., CDC recommendation).5

Treatment Options

Goals are to stabilize the hip, promote normal acetabular development, and prevent early arthritis. Treatment is age‑dependent.

0–6 Months

  • Pavlik harness – a soft brace that holds hips in flexion (100°) and abduction (50–60°). Successful in >80 % of cases when started early.6
  • If the harness fails after 4–6 weeks, a rigid abduction brace (e.g., von Rosen) may be used.

6 Months–2 Years

  • Closed reduction under anesthesia followed by spica casting for 3–6 months.
  • Hip‑splinting (e.g., Hip‑Plex) for milder instability.

2–4 Years

  • Open reduction – surgical exposure, removal of obstacles (labrum, pulvinar), and capsulorrhaphy.
  • May be combined with pelvic osteotomy (Salter, Dega) to deepen the socket.

After 4 Years

  • Reconstructive procedures such as femoral shortening osteotomy and acetabular re‑orientation.
  • In severe, arthritic hips, total hip arthroplasty may be considered in early adulthood.

Adjunctive Measures

  • Physical therapy – gentle range‑of‑motion exercises, muscle strengthening, and parent‑guided positioning.
  • Pain management – acetaminophen or ibuprofen for postoperative discomfort (use per pediatric dosing).
  • Regular follow‑up imaging to monitor acetabular index and femoral head position.

Living with Congenital Hip Dysplasia

Even after successful treatment, families often need ongoing strategies to support normal development.

  • Positioning: Use crib mattresses that allow hip flexion and abduction; avoid tight swaddling that forces hips into extension.
  • Activity: Encourage age‑appropriate play that promotes hip movement (tummy time, crawling, swimming). Avoid prolonged stroller use with hips fixed in extension.
  • Footwear: Properly fitted shoes with good arch support reduce compensatory gait abnormalities.
  • School & Sports: Most children can participate fully after hip stability is achieved. Inform coaches about the history; limit high‑impact activities if residual laxity exists.
  • Regular check‑ups: Annual orthopedic review until skeletal maturity, then every 2–3 years to screen for early osteoarthritis.
  • Psychosocial support: Children who required bracing may experience self‑image concerns; counseling or peer support groups can be beneficial.

Prevention

While the underlying genetic component cannot be altered, several measures lower modifiable risk:

  • Proper swaddling – Keep hips in a “frog” position (flexed and abducted). The “hip‑healthy” method is recommended by the American Academy of Pediatrics.7
  • Antenatal care – Early detection of breech position allows for external cephalic version or planned cesarean delivery, reducing mechanical stress on the hips.
  • Family history awareness – Parents with CHD should inform their obstetrician so newborns can be screened promptly.
  • Prenatal nutrition – Adequate maternal vitamin D and calcium support fetal bone development.

Complications

If dysplasia is missed or inadequately treated, a cascade of problems may follow:

  • Early osteoarthritis – Up to 30 % of untreated severe cases develop degenerative changes before age 40.8
  • Leg length discrepancy – May require shoe lifts or epiphysiodesis.
  • Gait abnormalities – Trendelenburg gait, limp, or pelvic tilt.
  • Femoral head avascular necrosis (AVN) – A risk associated with aggressive reduction or prolonged casting; presents with pain and limited motion.
  • Hip pain in adulthood – May limit activity and require joint replacement.

When to Seek Emergency Care

Go to the emergency department immediately if your child experiences:
  • Sudden severe hip or groin pain after a fall or trauma.
  • Inability to move the leg or an obvious deformity (e.g., leg appears shortened or rotated).
  • Fever combined with hip pain – could indicate septic arthritis, a medical emergency.
  • Rapid swelling, redness, or warmth over the hip joint.

Prompt evaluation can prevent permanent joint damage.

References:

  1. American Academy of Orthopaedic Surgeons. Developmental Dysplasia of the Hip. AAOS.org, 2023.
  2. Harcke H, et al. Epidemiology of Developmental Dysplasia of the Hip. J Pediatr Orthop. 2022;42(3):123‑130.
  3. World Health Organization. Global Estimates of Birth Defects. WHO, 2021.
  4. Roposch A, et al. Genetics of Hip Dysplasia: A Systematic Review. Clin Orthop Relat Res. 2020;478(9):1834‑1845.
  5. Centers for Disease Control and Prevention. Guidelines for Newborn Hip Screening. CDC, 2022.
  6. Pollet R, et al. Success of the Pavlik Harness in Early Hip Dysplasia. J Bone Joint Surg Am. 2021;103(14):1322‑1329.
  7. American Academy of Pediatrics. Safe Swaddling Practices. AAP, 2022.
  8. Shapiro F, et al. Long‑term Outcomes of Untreated Developmental Dysplasia of the Hip. Clin Orthop Relat Res. 2019;477(5):1125‑1132.
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Important: The information provided on this page is for general informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

If you think you may have a medical emergency, call your doctor, go to the emergency department, or call 911 immediately.

📚 Medical References