Study terminated upon departure of PI from Sponsoring Institution.

The objective of this study is to collect data that will be used to later design a method for the early diagnosis of diagnosis of developmental dysplasia of the hip (DDH).

This will be a prospective study using an acoustic listening technique in combination with a standard clinical examination of DDH.

For both the clinical cases and healthy children that are enrolled, that all subjects will have an ultrasound completed for comparison to the use of the studied tuning fork method. The gold standard is POCUS (point of care ultrasound as performed by the pediatric orthopedic surgeon). Collected data will be compared to POCUS as performed by an expert and this is standard of care. Healthy subjects will be referred for evaluation and found to be healthy on subsequent US.

Inclusion Criteria:

• Infants included in this study must be born at full term with a gestational age of 0-6 months
• Infants of both genders will be included
• Infants must have been screened for DDH.

Exclusion Criteria:

• Infants born prematurely
• Infants greater than six months of age.
• Nonviable neonates and neonates of uncertain viability

Individual participant data that underlie the results reported in this article, after deidentification (text, tables, figures, and appendices).

Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research.

The investigator who proposed to use the data.Upon reasonable request. Requests should be directed to study team members. To gain access, data requestors will need to sign a data access agreement.