Developmental Dysplasia of the Hip
Pronounced: dis-PLAY-zhaEn Español (Spanish Version)
The hip is where the thigh bone and pelvis meet. The thigh bone has a ball-shaped top. This ball fits into a cup shape area on the pelvis. Developmental dysplasia of the hip (DDH) is a problem with how these bones fit together. The exact problem can vary between children but may include:
- Ball of the thigh is loose inside the cup of the pelvis—makes the hip unstable
- Ball moves easily out of the cup—causing a dislocation of the hip
- Ball and cup do not meet at all
- The cup is improperly shaped
The Hip Joint
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The exact cause of DDH is not known. Some factors that may play a role include:
- How the baby is positioned in the womb
- Maternal hormones
Certain carrying or wrapping techniques may also affect the growth of the hip, especially methods that have the child tightly bound in a position with the hips straight out and turned in.
Last reviewedFebruary 2014by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.